Leviticus 13:18-28

And when the flesh hath in the skin thereof a boil, and it is healed, and in the place of the boil there is a white rising, or a bright spot, reddish-white, then it shall be showed to the priest; and the priest shall look; and, behold, if the appearance thereof be lower than the skin, and the hair thereof be turned white, then the priest shall pronounce him unclean: it is the plague of leprosy, it hath broken out in the boil. But if the priest look on it, and, behold, there be no white hairs therein, and it be not lower than the skin, but be dim; then the priest shall shut him up seven days: and if it spread abroad in the skin, then the priest shall pronounce him unclean: it is a plague. But if the bright spot stay in its place, and be not spread, it is the scar of the boil; and the priest shall pronounce him clean. Or when the flesh hath in the skin thereof a burning by fire, and the quick flesh of the burning become a bright spot, reddish-white, or white; then the priest shall look upon it; and, behold, if the hair in the bright spot be turned white, and the appearance thereof be deeper than the skin; it is leprosy, it hath broken out in the burning: and the priest shall pronounce him unclean: it is the plague of leprosy. But if the priest look on it, and, behold, there be no white hair in the bright spot, and it be no lower than the skin, but be dim; then the priest shall shut him up seven days: and the priest shall look upon him the seventh day: if it spread abroad in the skin, then the priest shall pronounce him unclean: it is the plague of leprosy. And if the bright spot stay in its place, and be not spread in the skin, but be dim; it is the rising of the burning, and the priest shall pronounce him clean: for it is the scar of the burning.