Leviticus 13:20-22

Young's Literal Translation

²⁰ and the priest hath seen, and lo, its appearance [is] lower than the skin, and its hair hath turned white, and the priest hath pronounced him unclean; it [is] a plague of leprosy -- in an ulcer it hath broken out.

²¹ `And if the priest see it, and lo, there is no white hair in it, and it is not lower than the skin, and is become weak, then hath the priest shut him up seven days;

²² and if it spread greatly in the skin, then hath the priest pronounced him unclean, it [is] a plague;