Menachos 12:4-5

Menachos 12:4

One can offer a flour offering of 60 isaron and bring them all in a single vessel. If he obligates himself to bring 61 isaron, he can he bring 60 isaron in one vessel and one isaron in another. Since the community brings 61 isaron on the first day of Succos when it falls on Shabbos, it is appropriate that an individual be limited to bringing one isaron less than the community. Rabbi Shimon pointed out that some of the community’s 61 isaron are for offerings of bulls and some are for offerings of sheep and these are not combined (so it’s not really a statement as to how much an individual can bring at once). Rather, Rabbi Shimon said, the reason is because up to 60 isaron mix well. The Sages questioned whether 60 isaron truly mix any better than 61, to which Rabbi Shimon replied that such is the case with all prescribed measures. For example, a person is rendered ritually pure by immersing in 40 seah of water but not in slightly less than 40 seah. Similarly, one may not bring a freewill offering’s libation in one, two or five log, but one may do so in three, four, six or more than six log.

Menachos 12:5

Rabbi Akiva says that one may offer wine as a libation but not oil; Rabbi Tarfon permits even oil. Rabbi Tarfon said that just as wine is offered both as an obligation and a freewill offering, oil should likewise be offered both as an obligation and a freewill offering. Rabbi Akiva disagreed, saying that if we say this about wine, which is offered as an obligation by itself, should we say the same about oil, which is not offered as an obligation by itself? Two people may not jointly offer one isaron of flour but they may jointly offer a burnt offering, a peace offering or, in the case of bird offerings, even a single bird.