Leviticus 13:12-17

12And if a leprosy shall break out in the skin, and the leprosy shall cover all the skin of him that hath the plague from his head even to his foot, wherever the priest looketh; 13Then the priest shall consider: and, behold, if the leprosy hath covered all his flesh, he shall pronounce him clean that hath the plague: it is all turned white: he is clean. 14But when raw flesh appeareth in him, he shall be unclean. 15And the priest shall see the raw flesh, and pronounce him to be unclean: for the raw flesh is unclean: it is a leprosy. 16Or if the raw flesh shall turn again, and be changed into white, he shall come to the priest; 17And the priest shall see him: and, behold, if the plague is turned into white; then the priest shall pronounce him clean that hath the plague: he is clean.