Leviticus 13:22-27

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

²³and if in its place the bright spot stay — it hath not spread — it is an inflammation of the ulcer; and the priest hath pronounced him clean.

²⁴'Or when flesh hath in its skin a fiery burning, and the quickening of the burning, the bright white spot, hath been very red or white,

²⁵and the priest hath seen it, and lo, the hair hath turned white in the bright spot, and its appearance is deeper than the skin; leprosy it is, in the burning it hath broken out, and the priest hath pronounced him unclean; it is a plague of leprosy.

²⁶'And if the priest see it, and lo, there is no white hair on the bright spot, and it is not lower than the skin, and it is become weak, then the priest hath shut him up seven days;

²⁷and the priest hath seen him on the seventh day, if it spread greatly in the skin, then the priest hath pronounced him unclean; a plague of leprosy it is.