Parashas Metzora · Passuk 15:24
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim.
English: “And her niddah shall be upon him” — what does this teach? One might think he does not convey impurity to a person and earthenware; Scripture teaches “and her niddah shall be upon him” — just as she conveys impurity to a person and earthenware, so does he.
Equal impurity transfer
Chazal give the man who lies with a niddah the same capacity to convey impurity to people and earthenware as she has.