The Plague of Leprosy — Leviticus 13:33–37

then 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: and in the seventh day the priest shall look on the scall; and, behold, if the scall be not spread in the skin, and the appearance thereof be not deeper than the skin; then the priest shall pronounce him clean: and he shall wash his clothes, and be clean.

But if the scall spread abroad in the skin after his cleansing, then the priest shall look on him; and, behold, if the scall be spread in the skin, the priest shall not seek for the yellow hair; he is unclean.

But if in his eyes the scall be at a stay, and black hair be grown up therein; the scall is healed, he is clean: and the priest shall pronounce him clean.