Much of Tractate Menachot has so far focused on factors that disqualify a meal offering. A new mishnah on today’s daf introduces deviations from the ritual that do not invalidate it, including:
If one did not pour the oil, or did not mix the oil in … it is still fit.
At first glance, this is surprising. Most meal offerings (with the exception of the meal offering of a sinner) call for oil to be mixed into the flour, and a mishnah in the first chapter stated that completely omitting the oil invalidates the sacrifice. Therefore, we can’t be referring to a case where the oil is simply left out. The Gemara explains:
What does it mean “did not pour?” Doesn’t the verse write with regard to the pouring of the oil that doing so is indispensable? Rather, the mishnah must be referring to a case where a priest did not pour the oil onto the meal offering, but a non-priest did pour it.
Not only do the meal offerings require the presence of oil, but the act of pouring the oil is, as the rabbis learn from the Torah, an essential step. Therefore, an offering should be invalid if no pouring occurred. So what is the mishnah teaching? According to the Gemara, it teaches that pouring oil is not considered a sacred rite, and therefore, even a non-priest can do it without disqualifying the offering.
Problem solved? Not yet. The Gemara poses a difficulty with its own reading:
But didn’t we learn in a mishnah (103b): “One who volunteers to bring a meal offering of 61 tenths of an ephah of flour must bring a meal offering of 60 tenths of an ephah in one vessel and a meal offering of one tenth of an ephah in a second vessel, because 60 tenths of an ephah of flour can be properly mixed with a log of oil but 61 tenths cannot be properly mixed with the oil.” And we discussed it and asked: Even if 61 tenths of an ephah do not mix with one log of oil, what of it? But didn’t we learn in the mishnah here that if one did not mix the oil into it, the meal offering is still fit?
If we read the first case in our mishnah as merely indicating that a non-priest can perform the pouring, but the act is still necessary, we might reasonably assume the same applies to mixing: a non-priest can mix the flour and oil, but the act of mixing is essential. Yet a talmudic discussion far later in our tractate seems to indicate that the act of mixing is not in fact necessary. The mishnah there stated that a person can only bring 60 tenths of an ephah of flour in a single vessel, because that’s the maximum amount of flour that can be mixed with oil for a meal offering; but the Gemara there challenges the ruling by citing our mishnah, stating that a meal offering is still fit even if the oil hasn’t been mixed. Therefore, the Gemara asks, why must the amount of flour in a vessel be determined by the amount that can be mixed with oil, if this mixing is not an essential step of the process? The Gemara continues by citing Rabbi Zeira’s explanation, also found on Menachot 103b:
And Rabbi Zeira said: For any measure of flour that is suitable for mixing, the lack of mixing does not invalidate. And for any measure of flour that is not suitable for mixing, the lack of mixing invalidates the meal offering.
Rabbi Zeira makes an interesting and somewhat counterintuitive conceptual argument. An amount of flour that comprises the ideal volume for a meal offering, mixed with oil, is valid even if that oil is in fact never mixed in. But an amount that could not be mixed with oil, that from the get-go wasn’t suited for the ideal performance of this mitzvah, is in fact invalid if not mixed with oil — even though it could never have been properly mixed to begin with.
This principle of Rabbi Zeira’s is ultimately generalized and invoked in many disparate cases in the Gemara. For example, a mishnah in Yevamot indicates that the verbal declaration made during halitzah (severing of the levirate bond) is not indispensable, but mute people cannot perform halitzah. The Gemara there uses Rabbi Zeira’s principle to argue that so long as someone could make the declaration, the failure to actually do so does not disqualify the act. Similarly, in Nedarim, the Gemara argues that a man with normal hearing can nullify his wife’s vows even if he didn’t hear them, but a deaf man who could never have heard them is not capable of doing so. Ultimately, the generalization of this rule is that there are actions whose actual performance is not required, so long as they are capable of being performed. Only if the “ideal” or normative form of the mitzvah is definitionally impossible — such as mixing the flour with oil, or the declaration during halitzah — does the failure to perform this action invalidate the mitzvah.
Returning to our case, however, the Gemara is still left with a difficulty: Rabbi Zeira’s statement in the later sugya indicates that mixing is not essential so long as it’s possible, whereas the Gemara’s original reading of our mishnah here would indicate that mixing is essential, but it can be done by a non-priest. The Gemara goes on to dismiss the idea that these two clauses must follow the same logic, and argues that it’s perfectly plausible that the case of pouring refers to a non-priest pouring oil, but the mixing indicates that no mixing whatsoever is required.
Read all of Menachot 18 on Sefaria.
This piece originally appeared in a My Jewish Learning Daf Yomi email newsletter sent on January 29, 2026. If you are interested in receiving the newsletter, sign up here.
