TT #175 · 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 the additional applications derived from repeated use of “tzaraas”.
Sifra — Vayikra 13, Midrash Sefer
English: Why does the verse repeat 'tzaraas' three times? The repetition is used for multiple extensions of the law.
Textual derivation
The Sifra treats the three repetitions as separate textual bases for further applications of the tzaraas rules.