[He may] not [bathe with him] in a small [tub], for he inflates (raises the level of the water) for him

Note: Even in a big tub, he raises the level of the water a little. However, one who vows does not intend for such tiny benefits. If one vowed Stam from a loaf, perhaps he may warm his hands on it (Sof Halachah 2 - PF).

(Beraisa): He may bathe with him in a small steambath, for he takes some of his sweat (this is painful, and not beneficial).

Question: [Our Mishnah] taught that he may eat with him from a platter that returns. What is a platter that returns?

Answer #1: There (in Bavel) they say Posagta (it contains pieces; every guest takes one).

Answer #2: Rabanan here (in Eretz Yisrael): It is platter that has enough to eat, be satiated and have extra.

(Beraisa): [He may drink with him] from a cup that returns.

Question: What is a cup that returns?

Answer #1: There (in Bavel) they say heavily spiced wine. (Normally, everyone drinks only a little, so everyone has as much as he wants.)

Answer #2: Here (in Eretz Yisrael) they say that it has water of herbs and roots; people drink, and it returns [to the Ba'al ha'Bayis].

(Mishnah): He may not eat with him from a food bin set out in front of workers. He may not plow with him in the same row. R. Meir says so;

Chachamim say, he may [plow] far from him.

(Gemara): According to R. Meir, one may not teach him a trade (even though it is needed to live). According to R. Meir, he may not give a reason to vindicate him (in his judgment).

Note: KORBAN HA'EDAH says that advocating Zechus is forbidden, just like teaching him a trade, even though it is his livelihood. This connotes even for capital cases. Above (Halachah 4), we suggested that indeed, if he cannot permit the vow, Piku'ach Nefesh overrides the vow! There, the Gemara distinguished, and was stringent only when the Choleh vowed. If here we discuss only monetary cases, we can say that Chachamim permit, for it is like Hashavas Aveidah. This requires investigation. (PF)