(Mishnah - R. Dosa ben Arkinas): On [the first day of] Yom Tov of Rosh Hashanah, the Shali'ach Tzibur says 'strengthen us, Hash-m Elokeinu, this day of Rosh Chodesh, be it today or tomorrow. The next day, he says '... be it today or yesterday';

Chachamim did not agree to him.

(Gemara) Question: [Did Chachamim not agree to him] because he says '... be it today or yesterday'?

Or, is it because R. Yakov bar Acha said in the name of R. Yosah that the Shali'ach Tzibur on Yom Tov of Rosh Hashanah need not mention Rosh Chodesh, also here [this is why Chachamim did not agree to him]?

(Mishnah): If one was taken outside his Techum by Nochrim or a Ru'ach Ra'ah (evil spirit), he has only four Amos [in the place to which he was taken] to walk;

If they returned him to his Techum, it is as if he never left.

R. Gamliel and R. Elazar ben Azaryah say, if they brought him to another city and put him in a Dir or Sahar (a field where animals graze), he may traverse all of it;

R. Yehoshua and R. Akiva say, he has only four Amos.

An episode occurred in which [these Chachamim] came from Parandin, and their boat went away into the sea (left the Techum on Shabbos). R. Gamliel and R. Elazar ben Azaryah traversed the entire boat. R. Yehoshua and R. Akiva did not leave their four Amos, for they wanted to be stringent on themselves.

(Gemara) Question: (Why do we need our Mishnah?) If not [for our Mishnah], what would we say? (Surely we would say that he has only four Amos!)

Answer: He should be like one who left [his Techum] with permission, and he has 2000 Amos in every direction. Therefore, it needs to teach that he has only four Amos.

Answer: We learn from "Shevu Ish Tachtav.''

Question: What is the source for 2000 Amos?

Answer: We learn from "Al Yetzei Ish mi'Mkomo ba'Yom ha'Shevi'i.''

Question: Perhaps it is oppositely! (The first verse teaches 2000 Amos, and the latter teaches four Amos.)

Answer (R. Eliezer - Beraisa - Asa ben Akiva): We learn from a Gezeirah Shavah Makom-Makom. It says here (in the latter verse) Makom, and it says there [about Arei Miklat] "v'Samti Lecha Makom.'' Just like Makom there is 2000 Amos, also Makom here is 2000 Amos.

The four Amos that they said [are the place of a person] are his height with his hands stretched out.

R. Yehudah says, his body is three Amos, and [we allow another] Amah in order to take a barrel from above his head [when he lies down] and put it below his feet.

[One who has only four Amos,] when he defecates, he defecates to the side (a corner of his square of four Amos). When he prays, he prays [at the other end of the] diagonal (so he is more than four Amos from his excrement).

Question (R. Yudah bar Pazi): The four Amos that they said - are they a Techum, or not a Techum? (I.e. he has no Techum, just Chachamim permitted to him for his needs.)

If you will say that they are a Techum, we do not give to him four Amos [when Eruvin were placed for him] in two places [at opposite extremes of his Techum, e.g. 2000 Amos to the north and 2000 to the south. He may not leave his place, lest he leave his Techum]. If you will say that they are not a Techum, we give four Amos [also to this person who lost his Techum due to the two Eruvin] in two places. (We explained this like OHR SOMAYACH, Hilchos Eruvin 8:2).

Answer (R. Ze'ira): A Beraisa teaches that the four Amos that they said are a Techum.

Support (Mishnah): [If two each have four Amos and they overlap, they may bring food to the common area and eat together,] as long as this one is not Motzi from his (the common area) to his friend's.

Inference: [Our Mishnah] said only that if they returned him [to his Techum, it is as if he never left], but if he returned [on his own], he is forbidden.

(R. Acha): [Our Mishnah] is like R. Nechemyah;

(Beraisa): If Peros left the Techum b'Shogeg, people one may eat them. If it was Mezid, they may not eat them. R. Nechemyah says, they may eat them only if one returns them to their place b'Shogeg.

R. Nechemyah holds like R. Yehudah;

(Beraisa): If one tithed or cooked on Shabbos, if he was Shogeg, he may eat [it]. If he was Mezid, he may not eat. R. Meir says so. R. Yehudah says, if he was Shogeg he may eat on Motza'ei Shabbos.