Leviticus 13:33

then the skin shall be shaven, but the scurf shall not be shaven; and the priest shall set aside the person having the scurf the second time for seven days.

He shall be shaven, but the scall shall he not shave; and the priest shall shut up him that hath the scall seven days more:

then he shall be shaved, but he shall not shave the itch. Then the priest shall isolate the one who has the itch seven more days.