Question (R. Yosah): What is R. Lazar's and R. Shimon's source for a Bas Kohen Mekudeshes to a Yisrael, that she does not eat Terumah? Is it not from this verse "u'Vas Kohen Ki Sihyeh l'Ish Zar"?

Here [to disqualify a Bas Kohen Mekudeshes to a Yisrael] they establish it to discuss Eirusin, and here [when she is married to a Kohen forbidden to her] they establish it to discuss Nisu'in?! (We explained this like SHA'AREI TORAS ERETZ YISRAEL; SEFER NIR explains similarly.)

Question: What is the reason for Rabanan [to establish "Ish Zar" to be a Kohen]?

Answer: "L'Ish" [is extra, to teach] a man who feeds (permits eating Terumah, i.e. to a Bas Yisrael permitted to him).

Question: (Why do we need the verse to disqualify?) A Kal v'Chomer teaches this! A Yisrael, whose Bi'ah does not disqualify from Kehunah, [his] Eirusin disqualifies [a Bas Kohen] from Terumah. A Kohen Gadol, whose Bi'ah disqualifies [a widow] from Kehunah, all the more so [his] Eirusin should disqualify her from Terumah!

Answer: No (it is not a Kal v'Chomer). If you say that a Yisrael, who does not feed (permit) others, (his Eirusin disqualifies from Terumah), will you say so about a Kohen Gadol, who feeds others? Since he feeds others, his Eirusin should not disqualify from Terumah! (We explained this like SHA'AREI TORAS ERETZ YISRAEL, SEFER NIR.)

The Kal v'Chomer is broken, and you return to [need] the verse. Therefore, we need "l'Ish" - a man who feeds.

Question: Why don't R. Lazar and R. Shimon say that Eirusin disqualifies her from eating Terumah? What do R. Lazar and R. Shimon do [with the Kal v'Chomer]?

Is it because he is proper to eat? Or, is it because he is proper to feed?

Answer: We learn from the following [Mishnah. If a woman (even a Bas Yisrael) was married to a Kohen, and he became a Petzu'a Daka or Krus Shafchah , and is forbidden to her], if he did not have Bi'ah with her after he became a Petzu'a Daka or Krus Shafchah, she may eat [Terumah];

(R. Lazar, the Amora): This [Mishnah] is like R. Lazar and R. Shimon.

Can you say that [a Petzu'a Daka's wife eats] because he is proper to feed?! (All women are forbidden to him!) Rather, it is because he is proper to eat. (We explained this like PNEI MOSHE.)

(R. Yosi bei R. Bun): [According to R. Lazar and R. Shimon] it is not dependent on [being widowed] from Nisu'in [rather, on Bi'ah]. If they had Bi'ah, whether from Eirusin or Nisu'in, they are disqualified. If they did not have Bi'ah, whether from Eirusin or Nisu'in, they are Kosher.