Leviticus 13:4-6

4If the bright spot is white in the skin of his flesh, and in sight not deeper than the skin, and the hair of it not turned white; then the priest shall shut up him that hath the plague seven days:

5And the priest shall look on him the seventh day: and, behold, if the plague in his sight is at a stay, and the plague spreadeth not in the skin; then the priest shall shut him up seven days more:

6And the priest shall look on him again the seventh day: and, behold, if the plague is somewhat dark, and the plague spreadeth not in the skin, the priest shall pronounce him clean: it is but a scab: and he shall wash his clothes, and be clean.