Rashi on Leviticus 13:56/רש"י על ויקרא י״ג:נ״ו

1וקרע אתו THEN SHALL HE REND IT OUT — i. e. he shall tear out the plague-spot from the garment and burn it (just as he is commanded in the case mentioned in the next verse) (cf. Sifra, Tazria Parashat Nega'im, Chapter 16 2).