לֹא תַעֲמֹד עַל דַּם רֵעֶךָ
לא תעמד על דם רעך. לִרְאוֹת בְּמִיתָתוֹ וְאַתָּה יָכוֹל לְהַצִּילוֹ, כְּגוֹן טוֹבֵעַ בַּנָּהָר וְחַיָּה אוֹ לִיסְטִים בָּאִים עָלָיו (סנהדרין ע"ג):

לא תעמד על דם רעך NEITHER SHALT THOU STAND AGAINST THE BLOOD OF THY FELLOW — witnessing his death, you being able to rescue him: if, for instance, he is drowning in the river and if a wild beast or a robber is attacking him (Sifra, Kedoshim, Chapter 4 8; Sanhedrin 73a).

לא תעמד על דם רעך. שלא יתחבר עם אנשי דמים וידוע כי כמה נרצחו ונהרגו בעבור המלשינות ודואג האדומי לעד:
Do not stand idle when your fellowman is in danger [literally: Do not stand upon your fellowman’s blood] One must not become involved with men who shed blood. It is well known that many people have been murdered, many people have been killed, because of slander. Doeg the Edomite is a prime example [I Samuel 22:9–19].
[ח] ומנין שאם אתה יודע לו עדות שאין אתה רשאי לשתוק עליו? תלמוד לומר "לא תעמוד על דם רעך". ומנין אם ראית טובע בנהר או לסטים באים עליו או חיה רעה באה עליו, חייב אתה להצילו בנפשו? תלמוד לומר "לא תעמוד על דם רעך". ומנין לרודף אחר חבירו להורגו, ואחר הזכור, ואחר נערה המאורסה חייב אתה להצילו בנפשו? תלמוד לומר "לא תעמוד על דם רעך". "ולא תשנא את אחיך" – יכול לא תקללנו, לא תכנו, ולא תסטרנו? תלמוד לומר "בלבבך" – לא אמרתי כי אם בשנאה שבלב. ומנין שאם הוכחתו ארבעה וחמשה פעמים חזור והוכיח? תלמוד לומר "הוכח תוכיח". יכול אפילו אתה מוכיחו ופניו משתנות? תלמוד לומר "ולא תשא עליו חטא".

And whence is it derived that if you can testify on someone's behalf, you are not permitted to remain silent? From "You shall not stand by the blood of your neighbor." And whence is it derived that if you see someone drowning in the river or being waylaid by robbers or attacked by a wild beast, that you must rescue him? From "You shall not stand by the blood of your neighbor." And whence is it derived that (if you see) a man pursuing another to kill him or to sodomize him, or after a betrothed maiden, that you must rescue the pursued by (taking) the life of the pursuer? From "You shall not stand by the blood of your neighbor." (Vayikra 19:17)

שלא לעמד על דם רעים - שלא נמנע מלהציל נפש מישראל כשנראהו בסכנת המיתה והאבדה ויהיה לנו יכלת להצילו בשום צד, שנאמר (ויקרא יט טז) לא תעמד על דם רעך. ואמרינן בסנהדרין (עג א) תניא מנין לרואה את חברו שטובע בנהר או חיה גוררתו או לסטים באים עליו שהוא חיב להצילו בנפשו שנאמר לא תעמד על דם רעך. ולא מבעיא אצוליה בנפשיה דמחיב, אלא מטרח ומיגר נמי אגירי חיב, ועוד כללו דבותינו ז''ל באזהרה זו שלא לכבש עדות כדי שלא יאבד חברו ממון. וכן הוא בספרא (סדר קדושים ד ח) מנין שאם נודע לו עדות שאינו רשאי לשתק עליה, שנאמר ולא תעמד על דם רעך. ומנין שאם ראיתו טובע בנהר וכו'. ומנין לרודף אחר חברו להרגו, שאתה חיב להצילו בנפשו? שנאמר לא תעמד וגו'.
To not stand over the blood of neighbors: That we not refrain from saving the soul of an Israelite when we see him in danger of death and destruction and we have the ability to save him from any side, as it is stated (Leviticus 19:16), "you shall not stand over the blood of your neighbor." And we say in Sanhedrin 73a, "We learn, 'From where [do we know] about one who sees his fellow drowning in a river, or being dragged away by a wild animal, or [that there are] bandits coming against him, that he is obligated to save him with his life? As it is stated, "you shall not stand over the blood of your neighbor."' It is not needed that he is obligated with his life, but he is also obligated to tarry and hire [others to do so]." And our Rabbis, may their memory be blessed also included in this warning (negative commandment) not to suppress testimony so that his fellow not lose money. And so is it in Sifra, Kedoshim, Chapter 4:8, "From where [do we know] that if testimony is known to him that he is not permitted to remain silent about it? As it is stated, 'you shall not stand over the blood of your neighbor.' And from where [do we know] if you see someone drowning in the river, etc. And from where [do we know about] one pursuing his fellow to kill him, that you are obligated to rescue him with [the soul of the pursuer]? As it is stated, 'you shall not stand, etc.'"
שרש מצוה זו ידוע, כי כמו שיציל האחד את חברו כן חברו יציל אותו ויתישב העולם בכך, והאל חפץ בישובו כי לשבת יצרה, וכבר נתבארו דיני מצוה זו במסכת סנהדרין (עג א).
The root of this commandment is well-known - as [just] like one will save his fellow, so [too,] will his fellow save him. And the world will be inhabited like this, and God desires its habitation, as 'He created it to be inhabited.' And the laws of this commandment have already been elucidated in Tractate Sanhedrin.
ונוהגת בכל מקום ובכל זמן בזכרים ונקבות. והעובר עליה ונמנע מלהציל ויש יכלת בידו עבר על לאו, ואין לוקין עליו לפי שהוא לאו שאין בו מעשה, דקימא לן אין לוקין עליו.
And it is practiced in every place and at all times by males and females. And one who transgresses it and refrains from saving [a Jew in danger] and has the ability [to do so] has violated this negative commandment. But we do not administer lashes for it, since it is a negative commandment that does not have an act [involved] with it - and it is established for us that we do not administer lashes [in such a case].
הַמְרַגֵּל בַּחֲבֵרוֹ עוֹבֵר בְּלֹא תַּעֲשֶׂה שֶׁנֶּאֱמַר (ויקרא יט טז) "לֹא תֵלֵךְ רָכִיל בְּעַמֶּיךָ". וְאַף עַל פִּי שֶׁאֵין לוֹקִין עַל דָּבָר זֶה עָוֹן גָּדוֹל הוּא וְגוֹרֵם לַהֲרֹג נְפָשׁוֹת רַבּוֹת מִיִּשְׂרָאֵל. לְכָךְ נִסְמָךְ לוֹ (ויקרא יט טז) "וְלֹא תַעֲמֹד עַל דַּם רֵעֶךָ". צֵא וּלְמַד מָה אֵרַע לְדוֹאֵג הָאֲדֹמִי: אֵי זֶהוּ רָכִיל. זֶה שֶׁטּוֹעֵן דְּבָרִים וְהוֹלֵךְ מִזֶּה לָזֶה וְאוֹמֵר כָּךְ אָמַר פְּלוֹנִי כָּךְ וְכָךְ שָׁמַעְתִּי עַל פְּלוֹנִי. אַף עַל פִּי שֶׁהוּא אֱמֶת הֲרֵי זֶה מַחֲרִיב אֶת הָעוֹלָם. יֵשׁ עָוֹן גָּדוֹל מִזֶּה עַד מְאֹד וְהוּא בִּכְלַל לָאו זֶה וְהוּא לָשׁוֹן הָרַע. וְהוּא הַמְסַפֵּר בִּגְנוּת חֲבֵרוֹ אַף עַל פִּי שֶׁאוֹמֵר אֱמֶת. אֲבָל הָאוֹמֵר שֶׁקֶר נִקְרָא מוֹצִיא שֵׁם רַע עַל חֲבֵרוֹ. אֲבָל בַּעַל לָשׁוֹן הָרַע זֶה שֶׁיּוֹשֵׁב וְאוֹמֵר כָּךְ וְכָךְ עָשָׂה פְּלוֹנִי וְכָךְ וְכָךְ הָיוּ אֲבוֹתָיו וְכָךְ וְכָךְ שָׁמַעְתִּי עָלָיו וְאָמַר דְּבָרִים שֶׁל גְּנַאי. עַל זֶה אָמַר הַכָּתוּב (תהילים יב ד) "יַכְרֵת ה' כָּל שִׂפְתֵי חֲלָקוֹת לָשׁוֹן מְדַבֶּרֶת גְּדלוֹת": אָמְרוּ חֲכָמִים שָׁלֹשׁ עֲבֵרוֹת נִפְרָעִין מִן הָאָדָם בָּעוֹלָם הַזֶּה וְאֵין לוֹ חֵלֶק לָעוֹלָם הַבָּא. עֲבוֹדַת כּוֹכָבִים וְגִלּוּי עֲרָיוֹת וּשְׁפִיכוּת דָּמִים. וְלָשׁוֹן הָרַע כְּנֶגֶד כֻּלָּם. וְעוֹד אָמְרוּ חֲכָמִים כָּל הַמְסַפֵּר בְּלָשׁוֹן הָרַע כְּאִלּוּ כּוֹפֵר בָּעִקָּר. שֶׁנֶּאֱמַר (תהילים יב ה) "אֲשֶׁר אָמְרוּ לִלְשֹׁנֵנוּ נַגְבִּיר שְׂפָתֵינוּ אִתָּנוּ מִי אָדוֹן לָנוּ". וְעוֹד אָמְרוּ חֲכָמִים שְׁלֹשָׁה לָשׁוֹן הָרַע הוֹרֶגֶת. הָאוֹמְרוֹ. וְהַמְקַבְּלוֹ. וְזֶה שֶׁאוֹמֵר עָלָיו. וְהַמְקַבְּלוֹ יוֹתֵר מִן הָאוֹמְרוֹ: וְיֵשׁ דְּבָרִים שֶׁהֵן אֲבַק לָשׁוֹן הָרַע. כֵּיצַד. מִי יֹאמַר לִפְלוֹנִי שֶׁיִּהְיֶה כְּמוֹת שֶׁהוּא עַתָּה. אוֹ שֶׁיֹּאמַר שִׁתְקוּ מִפְּלוֹנִי אֵינִי רוֹצֶה לְהוֹדִיעַ מָה אֵרַע וּמֶה הָיָה. וְכַיּוֹצֵא בַּדְּבָרִים הָאֵלּוּ. וְכָל הַמְסַפֵּר בְּטוֹבַת חֲבֵרוֹ בִּפְנֵי שׂוֹנְאָיו הֲרֵי זֶה אֲבַק לָשׁוֹן הָרַע שֶׁזֶּה גּוֹרֵם לָהֶם שֶׁיְּסַפְּרוּ בִּגְנוּתוֹ. וְעַל זֶה הָעִנְיָן אָמַר שְׁלֹמֹה (משלי כז יד) "מְבָרֵךְ רֵעֵהוּ בְּקוֹל גָּדוֹל בַּבֹּקֶר הַשְׁכֵּים קְלָלָה תֵּחָשֶׁב לוֹ". שֶׁמִּתּוֹךְ טוֹבָתוֹ בָּא לִידֵי רָעָתוֹ. וְכֵן הַמְסַפֵּר בְּלָשׁוֹן הָרַע דֶּרֶךְ שְׂחוֹק וְדֶרֶךְ קַלּוּת רֹאשׁ כְּלוֹמַר שֶׁאֵינוֹ מְדַבֵּר בְּשִׂנְאָה. הוּא שֶׁשְּׁלֹמֹה אָמַר בְּחָכְמָתוֹ (משלי כו יח) "כְּמִתְלַהְלֵהַּ הַיֹּרֶה זִקִּים חִצִּים וָמָוֶת" (משלי כו יט) "וְאָמַר הֲלֹא מְשַׂחֵק אָנִי". וְכֵן הַמְסַפֵּר לָשׁוֹן הָרַע דֶּרֶךְ רַמָּאוּת וְהוּא שֶׁיְּסַפֵּר לְתֻמּוֹ כְּאִלּוּ אֵינוֹ יוֹדֵעַ שֶׁדָּבָר זֶה שֶׁדִּבֵּר לָשׁוֹן הָרַע הוּא אֶלָּא כְּשֶׁמְּמַחִין בּוֹ אוֹמֵר אֵינִי יוֹדֵעַ שֶׁדָּבָר זֶה לָשׁוֹן הָרַע אוֹ שֶׁאֵלּוּ מַעֲשָׂיו שֶׁל פְּלוֹנִי: אֶחָד הַמְסַפֵּר בְּלָשׁוֹן הָרַע בִּפְנֵי חֲבֵרוֹ אוֹ שֶׁלֹּא בְּפָנָיו, וְהַמְסַפֵּר דְּבָרִים שֶׁגּוֹרְמִים אִם נִשְׁמְעוּ אִישׁ מִפִּי אִישׁ לְהַזִּיק חֲבֵרוֹ בְּגוּפוֹ אוֹ בְּמָמוֹנוֹ, וַאֲפִלּוּ לְהָצֵר לוֹ אוֹ לְהַפְחִידוֹ, הֲרֵי זֶה לָשׁוֹן הָרַע. וְאִם נֶאֶמְרוּ דְּבָרִים אֵלּוּ בִּפְנֵי שְׁלֹשָׁה כְּבָר נִשְׁמַע הַדָּבָר וְנוֹדַע. וְאִם סִפֵּר הַדָּבָר אֶחָד מִן הַשְּׁלֹשָׁה פַּעַם אַחֶרֶת אֵין בּוֹ מִשּׁוּם לָשׁוֹן הָרַע. וְהוּא שֶׁלֹּא יִתְכַּוֵּן לְהַעֲבִיר הַקּוֹל וּלְגַלּוֹתוֹ יוֹתֵר:

He who bears tales against his fellow violates a prohibitive commandment, saying: "Thou shalt not go up and down as a talebearer among thy people" (Lev. 19.16.); and although the punishment of flogging is not inflicted for violating this charge, it is a gross iniquity, and is the cause of the slaughtering of many souls in Israel; it is because thereof, that following this commandment is this Verse: "Neither shalt thou stand idly by the blood of thy neighbor" (Ibid.). Now, go ye and learn of that which happened to Doeg the Edomite.

כָּל הַיָּכוֹל לְהַצִּיל וְלֹא הִצִּיל עוֹבֵר עַל (ויקרא יט טז) "לֹא תַעֲמֹד עַל דַּם רֵעֶךָ". וְכֵן הָרוֹאֶה אֶת חֲבֵרוֹ טוֹבֵעַ בַּיָּם. אוֹ לִסְטִים בָּאִים עָלָיו. אוֹ חַיָּה רָעָה בָּאָה עָלָיו. וְיָכוֹל לְהַצִּילוֹ הוּא בְּעַצְמוֹ. אוֹ שֶׁיִּשְׂכֹּר אֲחֵרִים לְהַצִּילוֹ וְלֹא הִצִּיל. אוֹ שֶׁשָּׁמַע עוֹבְדֵי כּוֹכָבִים אוֹ מוֹסְרִים מְחַשְּׁבִים עָלָיו רָעָה אוֹ טוֹמְנִין לוֹ פַּח וְלֹא גִּלָּה אֹזֶן חֲבֵרוֹ וְהוֹדִיעוֹ. אוֹ שֶׁיָּדַע בְּעַכּוּ''ם אוֹ בְּאוֹנֵס שֶׁהוּא בָּא עַל חֲבֵרוֹ וְיָכוֹל לְפַיְּסוֹ בִּגְלַל חֲבֵרוֹ לְהָסִיר מַה שֶּׁבְּלִבּוֹ וְלֹא פִּיְּסוֹ. וְכָל כַּיּוֹצֵא בִּדְבָרִים אֵלּוּ. הָעוֹשֶׂה אוֹתָם עוֹבֵר עַל לֹא תַעֲמֹד עַל דַּם רֵעֶךָ:

5 When a murderer kills willfully, he should not be killed by witnesses or observers until he is brought to court and sentenced to death, as implied by Numbers 35:12 "A murderer should not be put to death until he stands before the congregation in judgment."

This law applies to all those liable for execution by the court, who transgressed and performed the forbidden act. They should not be executed until their trial is completed by the court.

6 When does the above apply? When the person has already transgressed and performed the transgression for which he is liable to be executed by the court. When, however, a person is pursuing a colleague with the intention of killing him - even if the pursuer is a minor - every Jewish person is commanded to attempt to save the person being pursued, even if it is necessary to kill the pursuer.

7 What is implied? If the rodef was warned and continues to pursue his intended victim, even though he did not acknowledge the warning, since he continues his pursuit he should be killed.

If it is possible to save the pursued by damaging one of the limbs of the rodef, one should. Thus, if one can strike him with an arrow, a stone or a sword, and cut off his hand, break his leg, blind him or in another way prevent him from achieving his objective, one should do so.

If there is no way to be precise in one's aim and save the person being pursued without killing the rodef, one should kill him, even though he has not yet killed his victim. This is implied by Deuteronomy 25:11-12, which states: "If a man is fighting with his brother, and the wife of one... grabs the attacker by his private parts, you must cut off her hand; you may not show pity."

8 There is no difference whether she grabs "his private parts" or any other organ that imperils his life. Similarly, the rodef may be a man or a woman. The intent of the verse is that whenever a person intends to strike a colleague with a blow that could kill him, the pursued should be saved by "cutting off the hand" of the rodef. If this cannot be done, the victim should be saved by taking the rodef's life, as the verse continues: "you may not show pity."

9This, indeed, is one of the negative mitzvot - not to take pity on the life of a rodef.

On this basis, our Sages ruled that when complications arise and a pregnant woman cannot give birth, it is permitted to abort the fetus in her womb, whether with a knife or with drugs. For the fetus is considered a rodef of its mother.

If the head of the fetus emerges, it should not be touched, because one life should not be sacrificed for another. Although the mother may die, this is the nature of the world.

10 The laws of a rodef apply whether a person is pursuing a colleague with the intent of killing him, or a maiden that had been consecrated with the intent of raping her, as reflected by Deuteronomy 22:26, which establishes an equation between murder and rape, stating: "Just as when a man arises against his colleague and kills him, so too, is this matter i.e., the rape of a consecrated maiden."

The same principle is reflected by another verse within the passage, which states (Ibid.:27): "The consecrated maiden cried out, but there was no one to save her." Implied is that if there is someone who can save her, he must do so, using all means including taking the life of the pursuer.

11 The same laws apply with regard to any woman forbidden as an ervah, but not to relations with an animal. With regard to homosexual rape, by contrast, one may save a man from being raped by killing the intended rapist.

If one pursues an animal with the intent of sodomizing it, or one seeks to perform a forbidden labor on the Sabbath or to worship idols - although the Sabbath and the prohibition against idol worship are fundamental elements of our faith - the person should not be killed until he commits the transgression and is brought to court, convicted and executed.

12 If a person pursued a woman forbidden as an ervah, took hold of her and inserted the head of his organ within her,he may not be slain, even though he has not concluded sexual relations. He must be brought to court.

If a man was pursuing a woman forbidden as an ervah, and other men were pursuing him to save her, and she tells them, "Let him be, so that he does not kill me," they should not listen to her.Instead, he should be intimidated and prevented from raping her, by maiming his limbs. If he cannot be prevented by maiming his limbs, his life may be taken, as explained above.

13 When a person could prevent a murder or a rape by maiming the rodef's limbs, but did not take the trouble and instead saved the victim by killing the rodef, he is regarded as one who shed blood and is liable for death. Nevertheless, he should not be executed by the court.

14 Whenever a person can save another person's life, but he fails to do so, he transgresses a negative commandment, as Leviticus 19:16 states: "Do not stand idly by while your brother's blood is at stake."

Similarly, this commandment applies when a person sees a colleague drowning at sea or being attacked by robbers or a wild animal, and he can save him himself or can hire others to save him. Similarly, it applies when he hears gentiles or mosrim conspiring to harm a colleague or planning a snare for him, and he does not inform him and notify him of the danger.46

And it applies when a person knows of a gentile or a man of force who has a complaint against a colleague, and he can appease the aggressor on behalf of his colleague, but he fails to do so. And similarly, in all analogous instances, a person who fails to act transgresses the commandment: "Do not stand idly by while your brother's blood is at stake."

15 When a person sees a rodef pursuing a colleague to kill him, or a woman forbidden as an ervah to rape her, and he has the potential to save the victim and yet fails to do so, he has negated the observance of the positive commandment: "You must cut off her hand," and has transgressed two negative commandments: "You may not show pity," and "Do not stand idly by while your brother's blood is at stake."

16 Even though lashes are not given as punishment for the transgression of these prohibitions - because they do not involve committing a forbidden deed - they are nevertheless very severe. For whoever causes the loss of a Jewish soul is considered as if he destroyed the entire world, and whoever saves a Jewish soul is considered as if he saved the entire world.

פִּדְיוֹן שְׁבוּיִים קוֹדֵם לְפַרְנָסַת עֲנִיִּים וְלִכְסוּתָן. וְאֵין לְךָ מִצְוָה גְּדוֹלָה כְּפִדְיוֹן שְׁבוּיִים שֶׁהַשָּׁבוּי הֲרֵי הוּא בִּכְלַל הָרְעֵבִים וְהַצְּמֵאִים וַעֲרוּמִּים וְעוֹמֵד בְּסַכָּנַת נְפָשׁוֹת. וְהַמַּעֲלִים עֵינָיו מִפִּדְיוֹנוֹ הֲרֵי זֶה עוֹבֵר עַל (דברים טו ז) "לֹא תְאַמֵּץ אֶת לְבָבְךָ וְלֹא תִקְפֹּץ אֶת יָדְךָ" וְעַל (ויקרא יט טז) "לֹא תַעֲמֹד עַל דַּם רֵעֶךָ" וְעַל (ויקרא כה נג) "לֹא יִרְדֶּנּוּ בְּפֶרֶךְ לְעֵינֶיךָ". וּבִטֵּל מִצְוַת (דברים טו ח) (דברים טו יא) "פָתֹחַ תִּפְתַּח אֶת יָדְךָ לוֹ". וּמִצְוַת (ויקרא כה לו) "וְחֵי אָחִיךָ עִמָּךְ". (ויקרא יט יח) "וְאָהַבְתָּ לְרֵעֲךָ כָּמוֹךָ". (משלי כד יא) "וְהַצֵּל לְקֻחִים לַמָּוֶת" וְהַרְבֵּה דְּבָרִים כָּאֵלּוּ. וְאֵין לְךָ מִצְוָה רַבָּה כְּפִדְיוֹן שְׁבוּיִים:
The redemption of captives held for ransom takes precedence over sustaining the poor and clothing them. You do not find a mitzvah greater than the redemption of captives, for captivity is in the same category as famine, drought, or exposure, and one stands in danger to one's life. One who averts his eyes from redeeming [the captive] transgresses [the commandment], (Deut. 15:7) Do not harden your heart and shut your hand, and (Lev. 19:16) Do not stand upon the blood of your neighbor, and (Lev. 25:53) He shall not rule ruthlessly over him in your sight, and nullifies the commandment (Deut. 15:8) You must open your hand, and the commandment, (Lev. 25:36) Let him live by your side as your kinsman, and (Lev. 19:18) Love your fellow as yourself, and (Proverbs 24:11) If you refrained from rescuing those taken off to death, [those condemned to slaughter--if you say, "We knew nothing of it," surely He who fathoms hearts will discern], and many such sayings. You cannot find a greater mitzvah than the redemption of captives.153See Babylonian Talmud Bava Batra 8a-b on the importance of redeeming captives and Chullin 7a where Rabbi Phineas ben Yair travels to redeem captives and, on the way, a river parts for him, enabling him to pass through on dry land to fulfill his duty.
חייב אדם להציל את חבירו בין בגופו בין בממונו ובו סעיף א':
הרואה את חבירו טובע בים או ליסטים באין עליו או חיה רעה באה עליו ויכול להצילו הוא בעצמו או שישכור אחרים להציל ולא הציל או ששמע עכו"ם או מוסרים מחשבים עליו רעה או טומנים לו פח ולא גילה אוזן חבירו והודיעו או שידע בעכו"ם או באנס שהו' בא על חבירו ויכול לפייסו בגלל חבירו ולהסיר מה שבלבו ולא פייסו וכיוצא בדברים אלו עובר על לא תעמוד על דם רעך:
The obligation for a man to save his friend in body, money, or the like. One who saw his fellow drowning, or threatened by thieves or by a wild animal, and could have either saved him himself or hired others to save him – and he did not – or someone who heard that gentiles or informants are plotting against someone or preparing to ensnare him – and he did not reveal this to his friend and tell him – or someone who knew that a gentile or violent man was approaching his fellow, and he could have appeased him and changed his attitude towards his fellow – and he did not appease him – in all such situations, he has transgressed, “Do not stand idly by the blood of your neighbor.”
המעלים עיניו מפדיון שבויים עובר על לא תאמץ את לבבך ועל לא תקפוץ את ידך ועל לא תעמוד על דם רעך ועל לא ירדנו בפרך לעיניך ובטל מצות פתוח תפתח את ידך לו ומצות וחי אחיך עמך ואהבת לרעך כמוך והצל לקוחים למות והרבה דברים כאלו:
He who shuts his eyes against the ransoming of captives transgresses the negative precepts, "Thou shalt not harden thy heart",2Deut. 15:7. and, "[Thou shalt not] shut thy hand";2Deut. 15:7. also this, "Neither shalt thou stand against the blood of thy neighbor",3Lev. 19:16. and this, "He shall not rule with rigor over him in thy sight";1Lev. 25:53. and he neglects the positive precepts, "Thou shalt surely open thy hand unto him",2Dent. 15:8. and, "that thy brother may live with thee,"3Lev. 25:36. The Hebrew text permits the rendition “Let thy brother live,” etc. and, "Thou shalt love thy neighbor as thyself"4Lev. 19:18. and, "Deliver them that are carried away unto death."5Prov. 24:11.
כל רגע שמאחר לפדות השבויים היכא דאפשר להקדים הוי כאילו שופך דמים:
Every moment that one delays unnecessarily the ransoming of a captive, it is as if he were to shed blood.
אין פודין השבויים יותר מכדי דמיהם מפני תיקון העולם שלא יהיו האויבים מוסרים עצמם עליהם לשבותם אבל אדם יכול לפדות את עצמו בכל מה שירצה וכן לת"ח או אפי' אינו ת"ח אלא שהוא תלמיד חריף ואפשר שיהיה אדם גדול פודים אותו בדמים מרובים (ואם אשתו כאחר דמי או לא עיין בטור אבן העזר סי' ע"ח):
Captives are not to be ransomed at an unreasonable cost, for the safety of society; otherwise, the enemies would exert every effort to capture victims. But a man may ransom himself at any price. So also, a scholar should be ransomed at a greater price, or even a student who gives promise of becoming a great scholar. (As to whether one's wife is considered "another" or "one's self," see Eben Ha-Ezer,6Eben Ha-Ezer is the fourth part of this code of Shulhan Arukh, and deals with laws pertaining to woman. 78.)
אין מבריחין השבויים מפני תיקון העולם שלא יהיו האויבים מכבידים עולם עליהם ומרבים בשמירתם:
Captives should not be aided to escape, for the sake of public safety; lest the enemies treat the captives with greater severity and confine them under closer custody.

Based on an address by the Rebbe, Shabbat Parshat Kedoshim 5746 (May 10, 1986)

Do not stand by the blood of your fellow. Leviticus 19:16 ... to see him dying, and you are able to save him; for example, if he is drowning in a river and a beast or thieves are approaching him. Rashi’s commentary, ibid.

A cornerstone in the teachings of Rabbi Israel Baal Shem Tov, founder of the Chassidic movement, is the doctrine of hashgachah pratit, “specific divine providence.” Specific divine providence means that not only does G-d oversee and determine all that transpires in the universe, but that also every detail and every aspect of every event is by divine design. If a leaf is torn off its branch by a wind blowing in a distant forest, and is blown this way and that before coming to rest on a specific place—it is because it was so ordained by G-d toward a specific purpose.

The Baal Shem Tov also taught that “from everything that a person sees or hears he is to derive a lesson in his service of G-d.” These two principles are closely related; indeed, the second is a derivative of the first. If something happens, and you happen to witness or hear about it, then both the event and the fact that you have been made aware of it are by divine providence. The event could have taken place without your knowledge; so the fact that you have learned of it is also significant. It must prompt you to understand something or to do something, otherwise your awareness of it would have been to no purpose.

Therein lies the deeper meaning of the abovequoted passage from Rashi. Rashi explains the meaning of the verse “Do not stand by the blood of your fellow” by adding the words “to see him dying, and you are able to save him.” But the words “and you are able to save him” read more as statement of fact than a clause; it would seem that, for the sake of clarity, Rashi should have written “if you are able to save him” or “when you are able to save him.” In truth, however, the very fact that you see him dying should indicate to you that you are indeed able to save him. Rashi is saying: Do not hasten to conclude that there is nothing you can do about your brother’s distress. For if this were indeed the case, to what purpose would G-d cause you to witness it?

The Spiritual Dimension: Today, we are painfully aware that many of our brethren are threatened with spiritual extinction, G-d forbid. We see them drowning in materiality, we see them being devoured by a society that has lost its G-d and its moral moorings. This awareness implies a duty and a responsibility: “Do not stand by the blood of your fellow” applies no less to spiritual dangers than to cases of physical jeopardy. It also carries a divine guarantee: the very fact that you have been made aware of your fellow’s plight means that you are capable of doing something about it.