Leviticus 13:20-24

And if, when the priest seeth it, behold, it be in sight lower than the skin, and the hair thereof be turned white; the priest shall pronounce him unclean: it is a plague of leprosy broken out of the boil.

But if the priest look on it, and, behold, there be no white hairs therein, and if it be not lower than the skin, but be somewhat dark; then the priest shall shut him up seven days:

And if it spread much abroad in the skin, then the priest shall pronounce him unclean: it is a plague.

But if the bright spot stay in his place, and spread not, it is a burning boil; and the priest shall pronounce him clean.

Or if there be any flesh, in the skin whereof there is a hot burning, and the quick flesh that burneth have a white bright spot, somewhat reddish, or white;