Parashas Metzora · Passuk 14:19
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim.
English: “From his impurity” — from his impurity, and not from his zav status.
Mi’ut
Chazal limit the atonement of this chatas to the impurity of tzaraas; it does not cover the impurity of a zav.