TT #177 · Parshas Tazria · Aliyah 5 · Passuk 27
English: The priest shall examine him on the seventh day. If the lesion has spread in the skin, the priest shall pronounce him unclean; it is a tzaraas affliction.
Chabad.org — Chumash, English translation + Rashi for Vayikra 13:27
Torah Temimah cites Sifra (Toras Kohanim) for applying the rules of se'eis and baheres to one another.
Sifra — Vayikra 13, Midrash Sefer
English: The rules stated for a swelling apply to a bright spot, and those stated for a bright spot apply to a swelling.
Textual derivation
A rule stated for se'eis also applies to baheres, and a rule stated for baheres also applies to se'eis; the two qualifying appearances share these legal rules.