Leviticus 13:4-6

If the bright spot {be} white in the skin of his flesh, and in sight {be} not deeper than the skin, and the hair thereof be not turned white; then the priest shall shut up {him that hath} the plague seven days: And the priest shall look on him the seventh day: and, behold, {if} the plague in his sight be at a stay, {and} the plague spread not in the skin; then the priest shall shut him up seven days more: And the priest shall look on him again the seventh day: and, behold, {if} the plague {be} somewhat dark, {and} the plague spread not in the skin, the priest shall pronounce him clean: it {is but} a scab: and he shall wash his clothes, and be clean.