Leviticus 13:32-34

32On the seventh day the priest shall examine the diseased spot; if the scale has not spread and has no yellow hair in it, and the scale does not look deeper than the skin,

33then he shall shave himself, but he shall not shave the scale; and the priest shall isolate the person with the scale for seven more days.

34Then on the seventh day the priest shall look at the scale; if the scale has not spread on the skin and appears to be no deeper than the skin, the priest shall pronounce him clean; he shall wash his clothes and be clean.