Leviticus 13:24-28

24Or if in the flesh, in the skin thereof, there is a burning inflammation, and the place of the inflammation become a bright spot white-reddish or white,

25and the priest look on it, and behold, the hair is turned white in the bright spot, and it looketh deeper than the skin, it is a leprosy which is broken out in the inflammation; and the priest shall pronounce him unclean: it is the sore of leprosy.

26But if the priest look on it, and behold, there is no white hair in the bright spot, and it is no deeper than the skin, and is pale, the priest shall shut him up seven days.

27And the priest shall look on him the seventh day, and if it have spread much in the skin, the priest shall pronounce him unclean: it is the sore of leprosy.

28But if the bright spot have remained in its place, [and] not spread in the skin, and is pale, it is the rising of the inflammation; and the priest shall pronounce him clean; for it is the scar of the inflammation.