Leviticus 13:4-6

4But if the bright spot be white in the skin of his flesh, and look not deeper than the skin, and the hair thereof be not turned white, the priest shall shut up [him that hath] the sore seven days.

5And the priest shall look on him the seventh day; and behold, in his sight, the sore remaineth as it was, the sore hath not spread in the skin, then the priest shall shut him up seven days a second time.

6And the priest shall look on him again the seventh day, and behold, the sore is become pale and the sore hath not spread in the skin, then the priest shall pronounce him clean; it is a scab; and he shall wash his garments and be clean.