Parashas Metzora · Passuk 14:03
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim.
English: “And the kohen shall look” — why does the verse say “the kohen”? Rather, a kohen who is himself able to enter inside the wall may purify the metzora; one who is unable to enter may not purify, for a metzora does not purify a metzora.
Mi’ut from repeated “ha-kohen”
Chazal teach that only a kohen who is not himself excluded from the camp may purify a metzora; one metzora cannot purify another. A kohen who is a zav or tamei meis remains eligible.