Related do Berachot 4:8

Just like the Torah established a set time to read the Shema, so too the Sages established a set time for [the] prayer [of Shemoneh Esreh]. Why did they say [that] the morning prayer [of Shmoneh Esreh can be prayed only] until noon? Because the morning Tamid (daily offering) [sacrifice] could be brought [only] until noon. Rebbi Yehudah says, “[The morning prayer of Shmoneh Esreh can be prayed only] until [the end of the first] four hours [of the day].” And why did they say that the Mincha (afternoon) prayer [of Shemoneh Esreh can only be prayed] until the evening? Because the afternoon Tamid [sacrifice] could be brought [only] until the evening. Rebbi Yehudah says, “[The Mincha prayer of Shmoneh Esreh can be prayed only] until Plag Hamincha.” And when is Plag Hamincha? Eleven minus one quarter hours [of the day] (i.e. 10 ¾ hours). And why did they say that the evening prayer [of Shmoneh Esreh] does not have a set time? Because the limbs and fats [of the sacrifices] could be brought the whole night. And why did they say that the Mussaf prayer [of Shmoneh Esreh can be prayed] the whole day? Because the Mussaf (additional offering) sacrifice could be brought the whole day. Rebbi Yehudah says, “[The Mussaf prayer can be prayed] until [the end of the first] seven hours [of the day].”

Just like the Torah established a set time to read the Shema, so too the Sages established a set time for [the] prayer [of Shemoneh Esreh]. Why did they say [that] the morning prayer [of Shmoneh Esreh can be prayed only] until noon? Because the morning Tamid (daily offering) [sacrifice] could be brought [only] until noon. Rebbi Yehudah says, “[The morning prayer of Shmoneh Esreh can be prayed only] until [the end of the first] four hours [of the day].” And why did they say that the Mincha (afternoon) prayer [of Shemoneh Esreh can only be prayed] until the evening? Because the afternoon Tamid [sacrifice] could be brought [only] until the evening. Rebbi Yehudah says, “[The Mincha prayer of Shmoneh Esreh can be prayed only] until Plag Hamincha.” And when is Plag Hamincha? Eleven minus one quarter hours [of the day] (i.e. 10 ¾ hours). And why did they say that the evening prayer [of Shmoneh Esreh] does not have a set time? Because the limbs and fats [of the sacrifices] could be brought the whole night. And why did they say that the Mussaf prayer [of Shmoneh Esreh can be prayed] the whole day? Because the Mussaf (additional offering) sacrifice could be brought the whole day. Rebbi Yehudah says, “[The Mussaf prayer can be prayed] until [the end of the first] seven hours [of the day].”

Just like the Torah established a set time to read the Shema, so too the Sages established a set time for [the] prayer [of Shemoneh Esreh]. Why did they say [that] the morning prayer [of Shmoneh Esreh can be prayed only] until noon? Because the morning Tamid (daily offering) [sacrifice] could be brought [only] until noon. Rebbi Yehudah says, “[The morning prayer of Shmoneh Esreh can be prayed only] until [the end of the first] four hours [of the day].” And why did they say that the Mincha (afternoon) prayer [of Shemoneh Esreh can only be prayed] until the evening? Because the afternoon Tamid [sacrifice] could be brought [only] until the evening. Rebbi Yehudah says, “[The Mincha prayer of Shmoneh Esreh can be prayed only] until Plag Hamincha.” And when is Plag Hamincha? Eleven minus one quarter hours [of the day] (i.e. 10 ¾ hours). And why did they say that the evening prayer [of Shmoneh Esreh] does not have a set time? Because the limbs and fats [of the sacrifices] could be brought the whole night. And why did they say that the Mussaf prayer [of Shmoneh Esreh can be prayed] the whole day? Because the Mussaf (additional offering) sacrifice could be brought the whole day. Rebbi Yehudah says, “[The Mussaf prayer can be prayed] until [the end of the first] seven hours [of the day].”

...The evening prayer [of Shmoneh Esreh] does not have a set time. Rebbi Elazar Bar Yossi says, “[A person should pray the evening Shmoneh Esreh] with the closing of the gates [of the Bet Hamikdash (Temple)].” Rebbi Elazar Bar Yossi said, “My father [always] prayed [the evening Shmoneh Esreh] with the closing of the gates [of the Bet Hamikdash].” [A person] who prays the Mussaf prayer [of Shmoneh Esreh] either after the morning Tamid [sacrifice] has been brought or before the morning Tamid [sacrifice] has been brought, has fulfilled his obligation [of praying the morning Shmoneh Esreh on time.]

... Rabbi 'Lazar (=El`azar) the son of Rabbi Zadok says, Father used to pray a short prayer on Sabbath eve: "Because of Your love, O Lord our God, with which You have loved Your people Israel, and because of Your kindness, Our King, which You have shown to the people of Your covenant, You have granted us, O Lord, this great and holy seventh day in love."

I would have thought that a person can pray [Shemoneh Esreh] all day long. [However] it explains in Daniel, “… and three times a day he prayed on his knees …” (Daniel 6:11) I would have thought that [a person] can pray facing any direction he wants. [However] the verse teaches us, “… where in the attic he had windows facing Yerushalayim …” (ibid.) I would have thought that [Daniel] only began to pray after he was exiled. [However] the verse teaches us, “… just as he had always done.” (ibid.)

I would have thought that [a person] should pray [Shmoneh Esreh] in a loud voice. [However] it explains by Chana, “and Chana was talking in her heart…” (I Samuel 1:13) I would have thought [a person] may pray all [three Shmoneh Esreh] in one shot. [However] it explains by David, “Evening, and morning, and afternoon…” (Psalms 55:18) Evening that is the Maariv prayer, morning that is the Shacharit prayer, and afternoon that is the Mincha prayer. I would have thought that [first a person] should ask for his [personal] needs and then he [should] pray [the established text of Shmoneh Esreh] and go away [from standing in front of God]. [However] it explains by Shlomo, “… to hear the song and the prayer …” (I Kings 8:28) Song that is the song,4 prayer that is the request. And so it says, “Sing before Hashem…” (Psalms 33:1)