MISHNA: From when, that is, from what time, does one recite Shema in the evening? From the time when the priests enter to partake of their teruma. Until when does the time for the recitation of the evening Shema extend? Until the end of the first watch. The term used in the Torah (Deuteronomy 6:7) to indicate the time for the recitation of the evening Shema is beshokhbekha, when you lie down, which refers to the time in which individuals go to sleep. Therefore, the time for the recitation of Shema is the first portion of the night, when individuals typically prepare for sleep. That is the statement of Rabbi Eliezer.
(א) תְּפִלַּת הַשַּׁחַר, עַד חֲצוֹת. רַבִּי יְהוּדָה אוֹמֵר, עַד אַרְבַּע שָׁעוֹת. תְּפִלַּת הַמִּנְחָה עַד הָעֶרֶב. רַבִּי יְהוּדָה אוֹמֵר, עַד פְּלַג הַמִּנְחָה. תְּפִלַּת הָעֶרֶב אֵין לָהּ קֶבַע. וְשֶׁל מוּסָפִין כָּל הַיּוֹם. רַבִּי יְהוּדָה אוֹמֵר, עַד שֶׁבַע שָׁעוֹת:
(1) Shacharit [can be said] until midday. Rabbi Yehudah says until four hours into the day. Minchah [can be said] until the evening. Rabbi Yehudah says until the middle of the afternoon. Ma'ariv has no set time and Musaf can be said all day. Rabbi Yehudah says until seven hours into the day.
(ג) רַבָּן גַּמְלִיאֵל אוֹמֵר, בְּכָל יוֹם מִתְפַּלֵּל אָדָם שְׁמֹנֶה עֶשְׂרֵה. רַבִּי יְהוֹשֻׁעַ אוֹמֵר, מֵעֵין שְׁמֹנֶה עֶשְׂרֵה. רַבִּי עֲקִיבָא אוֹמֵר, אִם שְׁגוּרָה תְפִלָּתוֹ בְּפִיו, יִתְפַּלֵּל שְׁמֹנֶה עֶשְׂרֵה. וְאִם לָאו, מֵעֵין שְׁמֹנֶה עֶשְׂרֵה:
(3) Rabban Gamliel says: Every day a person must pray eighteen [blessings of Shemoneh Esrei]. Rabbi Yehoshua says: [One may say] an abbreviated [form of the] eighteen [blessings]. Rabbi Akiva says: If his prayer is fluent in his mouth, he must say eighteen; and if it is not -- an abbreviated eighteen.
(ד) רַבִּי אֱלִיעֶזֶר אוֹמֵר, הָעוֹשֶׂה תְפִלָּתוֹ קֶבַע, אֵין תְּפִלָּתוֹ תַּחֲנוּנִים. רַבִּי יְהוֹשֻׁעַ אוֹמֵר, הַמְהַלֵּךְ בִּמְקוֹם סַכָּנָה, מִתְפַּלֵּל תְּפִלָּה קְצָרָה. אוֹמֵר, הוֹשַׁע הַשֵּׁם אֶת עַמְּךָ אֶת שְׁאֵרִית יִשְׂרָאֵל, בְּכָל פָּרָשַׁת הָעִבּוּר יִהְיוּ צָרְכֵיהֶם לְפָנֶיךָ. בָּרוּךְ אַתָּה ה' שׁוֹמֵעַ תְּפִלָּה:
(4) Rabbi Eliezer says: One who makes his prayer "set" [as though it is burdensome to him], his prayer does not constitute "pleading" [for Divine mercy]. Rabbi Yehoshua says: One who is traveling in a dangerous place should offer a brief prayer [and] say: Save, G-d, Your people, the remnant of Israel; at every period of transition let their needs be before You. You are the Source of all blessing, G-d, Who heeds prayer.
(ה) הָיָה רוֹכֵב עַל הַחֲמוֹר, יֵרֵד. וְאִם אֵינוֹ יָכוֹל לֵירֵד, יַחֲזִיר אֶת פָּנָיו, וְאִם אֵינוֹ יָכוֹל לְהַחֲזִיר אֶת פָּנָיו, יְכַוֵּן אֶת לִבּוֹ כְּנֶגֶד בֵּית קֹדֶשׁ הַקָּדָשִׁים:
(5) If one was riding a donkey, he should dismount from it [while he prays]. And if he is unable to dismount, he should turn his face [towards Jerusalem]. And if he is unable to turn his face, he should focus his heart toward the Holy of Holies [in the Temple in Jerusalem].
(ו) הָיָה יוֹשֵׁב בִּסְפִינָה אוֹ בְקָרוֹן אוֹ בְאַסְדָּה, יְכַוֵּן אֶת לִבּוֹ כְּנֶגֶד בֵּית קֹדֶש הַקָּדָשִׁים:
(6) If one was sitting in a boat, or in a wagon, or on a raft, [when he prays] he should focus his heart toward the Holy of Holies.
(א) אֵין עוֹמְדִין לְהִתְפַּלֵּל אֶלָּא מִתּוֹךְ כֹּבֶד רֹאשׁ. חֲסִידִים הָרִאשׁוֹנִים הָיוּ שׁוֹהִים שָׁעָה אַחַת וּמִתְפַּלְּלִים, כְּדֵי שֶׁיְּכַוְּנוּ אֶת לִבָּם לַמָּקוֹם. אֲפִלּוּ הַמֶּלֶךְ שׁוֹאֵל בִּשְׁלוֹמוֹ, לֹא יְשִׁיבֶנּוּ. וַאֲפִלּוּ נָחָשׁ כָּרוּךְ עַל עֲקֵבוֹ, לֹא יַפְסִיק:
(1) [One] should not stand up to pray unless he is in a serious frame of mind. The original pious ones used to wait one hour and then pray, in order to direct their hearts towards the Omnipresent. [While one is reciting Shemoneh Esrei,] even if the king greets him, he should not respond to him, and even if a snake wraps around his heel, he should not interrupt.