Leviticus 13:32-34

32And on the seventh day the priest shall examine the sore; and indeed if the scale has not spread, and there is no yellow hair in it, and the scale does not appear deeper than the skin,

33he shall shave himself, but the scale he shall not shave. And the priest shall isolate the one who has the scale another seven days.

34On the seventh day the priest shall examine the scale; and indeed if the scale has not spread over the skin, and does not appear deeper than the skin, then the priest shall pronounce him clean. He shall wash his clothes and be clean.