They may not expound upon the subject of forbidden relations in the presence of three. Nor the work of creation in the presence of two. Nor [the work of] the chariot in the presence of one, unless he is a sage and understands of his own knowledge. Whoever speculates upon four things, it would have been better had he not come into the world: what is above, what is beneath, what came before, and what came after. And whoever takes no thought for the honor of his creator, it would have been better had he not come into the world.

Yose ben Yoezer says that [on a festival] the laying of the hands [on the head of a sacrifice] may not be performed. Yosef ben Johanan says that it may be performed. Joshua ben Perahia says that it may not be performed. Nittai the Arbelite says that it may be performed. Judah ben Tabai says that it may not be performed. Shimon ben Shetah says that it may be performed. Shamayah says that it may be performed. Avtalyon says that it may not be performed. Hillel and Menahem did not dispute. Menahem went out, Shammai entered. Shammai says that it may not be performed. Hillel says that it may be performed. The former [of each] pair were patriarchs and the latter were heads of the court.

Bet Shammai say: They may bring thanksgiving offerings [on Yom Tov] but they may not lay their hands on them, and [they may not bring] wholly burnt-offerings. And Bet Hillel say: They may bring thanksgiving offerings and wholly burnt-offerings and lay their hands on them.

Atzeret (Shavuot) which fell on a Friday: Bet Shammai say: the day of the slaughter [of the wholly burnt offerings] is after Shabbat. And Bet Hillel say: the day of the slaughter is not after Shabbat. They agree, however, that if it falls on Shabbat, the day of the slaughter is after Shabbat. The high priest does not [in that case] put on his [special] garments, and mourning and fasting are permitted, in order not to confirm the view of those who say that Atzeret is after Shabbat.

If he immersed for unconsecrated [food], and was presumed to be fit to eat unconsecrated [food], he is prohibited from [eating second] tithe. If he immersed for [second] tithe, and was presumed to be fit to eat [second] tithe, he is prohibited from [eating] terumah. If he immersed for terumah, and was presumed to be fit to eat terumah, he is prohibited from [eating] holy things. If he immersed for holy things, and was presumed to be fit to eat holy things he is prohibited from [touching the waters of] purification. If one immersed for something possessing a stricter [degree of holiness], one is permitted [to have contact with] something possessing a lighter [degree of holiness]. If he immersed but without special intention, it is as though he had not immersed.

The garments of an am haaretz possess midras-impurity for Pharisees. The garments of Pharisees possess midras-impurity for those who eat terumah. The garments of those who eat terumah possess midras-impurity for [those who eat] sacred things. The garments of [those who eat] sacred things possess midras-impurity for [those who occupy themselves with the waters of] purification. Yose ben Yoezer was the most pious in the priesthood, yet his apron was [considered to possess] midras-impurity for [those who ate] sacred things. Yohanan ben Gudgada all his life used to eat [unconsecrated food] in accordance with the purity required for sacred things, yet his apron was [considered to possess] midras-impurity for [those who occupied themselves with the water of] purification.