TT #183 · Parshas Shemini · Aliyah 5 · Passuk 32
Chabad.org — Vayikra Chapter 11 with Rashi
English: “Or a garment or leather”: leather is compared with a garment, extending the rule to the corresponding class of leather.
Sifra (Toras Kohanim).
Wikisource — Sifra, Shemini, Chapter 7
Wikisource — Sifra, Shemini, Chapter 7
Analogy — The juxtaposition of garment and leather establishes the scope of the impurity rule.
Hide is compared with a land-grown garment material.