Kesuvos 2:7 - 2:8

אינן נאמנים – to give to them Terumah/priest’s due.

ובזמן שהן מעידין זה על זה – for each one says, “I and my colleague is a Kohen.”

ר' יהודה אומר אין מעלין לכהונה ע"פ עד אחד – even where there are not [witnesses] repaying each other (with mutual recommendations), and all the more so here, where one can be suspicious of repaying each other: “you testify about me and I [will testify] about you.”

עוררין – that they call upon him a name of disqualification, but there is no contesting the legitimacy of a person with less than two [people].

מעלין – where there aren’t [witnesses] repaying each other (with mutual recommendations), which is exactly what is between Rabbi Eliezer and the first Tanna/teacher of Rabbi Yehuda.

רשב"ג אומר מעלין לכהונה – In the Gemara (Tractate Ketubot 26a-26b) an objection is raised: Rabban Shimon ben Gamaliel is identical with Rabbi Eliezer and brings up that they disagree on whether they combine for testimony, such as the example that we treat here a case where the father of this [person] is a Kohen, and a rumor came out concerning him that he is the son of a divorced woman or a the son of a halutzah (where she removed the shoe of her dead husband’s brother who refused to leviratical marriage, and they put him down (from the status of priesthood) and one witness came and testified, “I know that he is a Kohen,” and they raised him [again] and [then] came two [other witnesses] and said [that] “he is the son of a divorced woman or the son of halutzah,” and they put him down [again] and [then] one witness came and said: “I know that he is a Kohen,” Rabban Shimon ben Gamaliel says that they raise him to the priesthood on [the testimony] of this last witness because they combine him with the first witness whose “voice” was voided, and who stated: “I know that he is a Kohen,” and even though they did not make their testimonies at the same time, their testimony combines and we state, we establish these two [witnesses] who stated that he is a Kohen with those two [witnesses] who stated that he is a the son of a divorced woman or the son of a halutzah, and we establish a person with his legal presumption, but for Rabbi Eliezer, we don’t raise him up until two witnesses will testify at the same time that he is a Kohen, but the Halakah is according to Rabban Shimon ben Gamaliel that the witnesses combine, even though they did not testify as one.