Parashas Metzora · Passuk 14:21
Chabad.org — English translation + Rashi
Torah Temima points to Arachin 17b (verified on the daf).
E-Daf.com — Tsurras Hadaf (size=3)
HebrewBooks / Shas PDF of the daf
English: “And if he is poor” — if someone said “the offering of this metzora is upon me,” and the metzora was rich but the one who vowed is poor, he still brings the rich man’s offering. Why? Because it is written “and if he is poor.”
Status follows the metzora
Chazal teach that when the metzora himself is rich, the offering must be the rich man’s offering even if a poor person undertakes it.