TT #258 · Parshas Tazria · Aliyah 7 · Passuk 47
English: If a garment has a lesion of tzaraas, whether in a wool garment or a linen garment,
Torah Temimah cites Bechoros 17a for excluding wool from an animal of uncertain species from garment-tzaraas impurity.
E-Daf — Bechoros 17a · Shas.org · Sefaria — Bechoros 17a, source text and translation
English: Rav Nachman bar Yitzchak teaches that wool from a nidmeh—an animal that resembles a different species—does not become impure through garment tzaraas.
Textual derivation
The wool’s halakhic classification matters: wool from a nidmeh, an animal that resembles another species, is excluded from this garment-tzaraas impurity rule.