(כט) וַיֹּ֣אמֶר אֱלֹקִ֗ים הִנֵּה֩ נָתַ֨תִּי לָכֶ֜ם אֶת־כָּל־עֵ֣שֶׂב ׀ זֹרֵ֣עַ זֶ֗רַע אֲשֶׁר֙ עַל־פְּנֵ֣י כָל־הָאָ֔רֶץ וְאֶת־כָּל־הָעֵ֛ץ אֲשֶׁר־בּ֥וֹ פְרִי־עֵ֖ץ זֹרֵ֣עַ זָ֑רַע לָכֶ֥ם יִֽהְיֶ֖ה לְאָכְלָֽה׃
"You know, it's a funny thing, Every one of the bastards that are out for legalizing marijuana is Jewish. What the Christ is the matter with the Jews, Bob? What is the matter with them? I suppose it is because most of them are psychiatrists."
—President Richard Milhous Nixon
Etymology
(כג) וְאַתָּ֣ה קַח־לְךָ֮ בְּשָׂמִ֣ים רֹאשׁ֒ מָר־דְּרוֹר֙ חֲמֵ֣שׁ מֵא֔וֹת וְקִנְּמָן־בֶּ֥שֶׂם מַחֲצִית֖וֹ חֲמִשִּׁ֣ים וּמָאתָ֑יִם וּקְנֵה־בֹ֖שֶׂם חֲמִשִּׁ֥ים וּמָאתָֽיִם׃
(23) Next take choice spices: five hundred weight of solidified myrrh, half as much—two hundred and fifty—of fragrant cinnamon, two hundred and fifty of aromatic cane,
לֹא־קָנִ֨יתָ לִּ֤י בַכֶּ֙סֶף֙ קָנֶ֔ה וְחֵ֥לֶב זְבָחֶ֖יךָ לֹ֣א הִרְוִיתָ֑נִי אַ֗ךְ הֶעֱבַדְתַּ֙נִי֙ בְּחַטֹּאותֶ֔יךָ הוֹגַעְתַּ֖נִי בַּעֲוֺנֹתֶֽיךָ׃ (ס)
You have not bought Me fragrant reed with money, nor sated Me with the fat of your sacrifices. Instead, you have burdened Me with your sins, You have wearied Me with your iniquities.
קנה. מין בושם
Kaneh: From a bosem (sweet/fragrant herb)
(א) אין עושין פתילה לנר של שבת בין נר שעל השלחן בין כל נר שמדליק בבית מדבר שהאור אינו נאחז בו אלא נסרך סביביו והשלהבת קופצת כגון צמר ושער וכיוצא בהם אלא מדבר שהאור נתלה בו כגון פשתן נפוצה ובגד שש וצמר גפן וקנבוס וכיוצא בהן.
One should not make the wick for a Sabbath lamp, whether it is the lamp on your table or any lamp that you light in the house... from something that the light does not come from the wick itself... for example wool, hair, etc... but rather from that which the light comes from the wick itself for example flax, cotton, or kanebos.
Benetowa, Sarah. 1936. Tracing one word through different languages. Institute of Anthropological Sciences, Warsaw. Reprinted 1967 in The Book of Grass. George Andrews and Simon Vinkenoog (eds.). Grove Press, New York, pp. 15-18.
The astonishing resemblance between the Semitic kanbos and the Scythian cannabis lead me to suppose that the Scythian word was of Semitic origin. These etymological discussions run parallel to arguments drawn from history. The Iranian Scythians were probably related to the Medes, who were neighbors of the Semites and could easily have assimilated the word for hemp. The Semites could also have spread the word during their migrations through Asia Minor.
Is it Legal?
אמר שמואל דינא דמלכותא דינא
Shmuel said: The law of the kingdom is the law, i.e., Jews must obey the laws of the state in which they live.
Is it Kosher?
Because of marijuana’s clear medical benefits, the Orthodox Union, which has rejected kosher certification requests from cigarette and e-cigarette manufacturers on health grounds, “would not have a problem certifying” medical marijuana, Elefant said.
Marijuana is a plant and therefore kosher certification is not necessary for the cannabis itself. But in New York State, where companies are vying for up to five licenses to grow and sell medical marijuana, patients will not be allowed to smoke pot, so they will have to ingest it in other ways — such as capsules, food or drinks, which will require kosher certification for Orthodox patients.
http://forward.com/news/215113/medical-marijuana-may-soon-get-kosher-stamp-of-app
Cannabis as Medicine
(ה) וּשְׁמַרְתֶּ֤ם אֶת־חֻקֹּתַי֙ וְאֶת־מִשְׁפָּטַ֔י אֲשֶׁ֨ר יַעֲשֶׂ֥ה אֹתָ֛ם הָאָדָ֖ם וָחַ֣י בָּהֶ֑ם אֲנִ֖י ה'׃
(5) You shall keep My laws and My rules, and humankind shall do them and live by them: I am Adonai.
ר' שמעון בן מנסיא אומר (שמות לא, טז) ושמרו בני ישראל את השבת אמרה תורה חלל עליו שבת אחת כדי שישמור שבתות הרבה א"ר יהודה אמר שמואל אי הואי התם הוה אמינא דידי עדיפא מדידהו (ויקרא יח, ה) וחי בהם ולא שימות בהם
Rabbi Shimon ben Menasya said: It is stated: “And the children of Israel shall keep Shabbat, to observe Shabbat” (Exodus 31:16).The Torah said: Desecrate one Shabbat on his behalf so he will observe many Shabbatot. Rav Yehuda said that Shmuel said: If I would have been there among those Sages who debated this question, I would have said that my proof is preferable to theirs, as it states: “You shall keep My statutes and My ordinances, which a person shall do and live by them” (Leviticus 18:5), and not that he should die by them. In all circumstances, one must take care not to die as a result of fulfilling the mitzvot.
(א) דיני הרופא. ובו ג' סעיפים:
נתנה התורה רשות לרופא לרפאות ומצוה היא ובכלל פיקוח נפש הוא ואם מונע עצמו הרי זה שופך דמים
The Torah gave permission to the doctor to heal, and it is even a commandment. Even more so, it is [the commandment] of saving a life. One who prevents oneself from doing so is considered to have shed blood.
Modern Rabbinic Responses
סימן לה, איסור עישון סמים, בע״ה. ב׳ דר״ה אייר תשל״ג, מע״כ מוה״ר ירוהם פראם שליט״א.
הנה בדבר אשר התחילו איזה בחורים מהישיבה לעשן חשיש (מעראוואנא), פשוט שהוא דבר אסור מכמה עיקרי דינים שבתורה, חדא שהוא מקלקל ומכלה את הגוף, ואף אם נמצאו אנשים בריאים שלא מזיק להם כל כך אבל מקלקל הוא את הדעת ואינם יכולים להבין דבר לאשורו, שזה עוד יותר חמור שלבד שמונע עצמו מלמוד התורה כראוי, הוא מניעה גם מתפלה וממצות התורה, שעשיה בלא דעת הראוי הוא כלא קיימם.
ועוד שהוא גורם תאוה גדולה אשר הוא יותר מתאות אכילה וכדומה הצריכים להאדם לחיותו, ויש שלא יוכלו לצמצם ולהעביר תאותם, והוא איסור החמור שנאמר בבן סורר ומורה על תאוה היותר גדולה שיש לו לאכילה אף שהוא לאכילת כשרות, וכ"ש שאסור להביא עצמו לתאוה גדולה
עוד יותר ולדבר שליכא שום צורך להאדם בזה שהוא אסור, ואף שלמלקות נימא שאין עונשין מן הדין מ"מ לאיסורא ודאי עובר על לאו זה ואיכא גם הטעם דאיכא בבן סורר ומורה שסופו שילסטם את הבריות כדאיתא בסנהדרין בפ' בן סורר (ס"ח ע"ב).
ועוד שהאב והאם של אלו שמעשנין זה מצטערים מאד אשר עוברין על מצות כבוד אב ואם. ועוד איכא איסור העשה דקדושים תהיו כפירוש הרמב"ן בחומש. וגם הם גורמים לאיסורים הרבה אחרים לבד זה, סוף דבר הוא פשוט וברור שהוא מאיסורים חמורים וצריך להשתדל בכל היכולת להעביר טומאה זו מכל בני ישראל ובפרט מאלו שלומדין בישיבות. והנני ידידו מוקירו, משה פיינשטיין.
והנני דידו מוקירו,
משה פיינשטיין
Igrot Moshe, Yoreh De’ah Vol. 3, Siman 35
Behold, with regard to certain yeshiva students who have begun smoking hash (marijuana), It is obviously forbidden to smoke marijuana, as this violates many basic laws of our Torah.
First of all, it physically injures the person. Even if there are people who are not physically affected by this, it mentally affects the person as it destroys his mind, and prevents him from understanding things properly. This is a terrible thing, since not only can the individual not properly study Torah, he also can not pray and properly perform mitzvot (commandments), since doing them mindlessly is considered as if they were not done at all.
Furthermore, he is creating within himself a very strong desire (addiction), which is much stronger than the desire to eat, etc. which are necessary for a person to live. There are many that can not control and withstand this desire. This is a very grave prohibition, as we find that a 'Wayward and Rebellious Son' [is killed] (See Deuteronomy 21:18) for creating within himself a very strong desire, even though it is to eat kosher food! How much more so it is forbidden for a person to bring upon himself an even greater desire, especially for something that a person does not need at all...
Additionally, the parents of the person smoking certainly pained by his actions, in which case he is violating the mitzvah of Kibbud Av V’Em (honoring one's father and mother). He is also violating the mitzvah of “Kedoshim Ti’Hiyu”(You shall be holy), as explained by the Ramban in his commentary on the chumash (5 Books of Moses). This also leads him to transgress other prohibitions, besides the actual prohibition of taking drugs. The bottom line is that it is clear and obvious that this is one of the grave prohibitions, and everyone must try with all of their strength to remove this impurity (tuma’ah) from all Children of Israel.”
Rabbi Elliot Dorff, Marijuana & Judaism
Still, Judaism allows Jews to ingest many things that are not intrinsically holy as part of the effort to fulfill the responsibility to maintain a healthy body, mind and soul, and furthermore, as part of enjoying God's bounty, even when not directly related to matters of health...Whether using marijuana recreationally fits into that Jewish description of the nature and purpose of life depends on what its effects turn out to be. If it decreases pain in dying patients, then one not only may, but must, work to make it legally available to them. Thus, in sum, marijuana in and of itself is not inherently bad or good; it must be judged in terms of its effects in creating a kingdom of priests and a holy nation.
Rabbi Zalman Schachter-Shalomi
The only thing I want to add is that just as the use of wine has been sacralized in Judaism for Kiddush (and in the sacrificial offering on the altar) and sexuality has been sacramentalized with Kiddushin, powerful substances like cannabis also need to be sacralized. By contrast it is clear that alcohol and sex lacking the dimension of the sacred leads to abuse. Likewise the use of mind altering substances where not sacralized are bound to be leading to abuse.