Leviticus 13:21

¹⁹and there should be in the place of the ulcer a white sore, or one looking white and bright, or fiery, and it shall be seen by the priest;

²⁰then the priest shall look, and, behold, if the appearance be beneath the skin, and its hair has changed to white, then the priest shall pronounce him unclean; because it is a leprosy, it has broken out in the ulcer.

— Leviticus 13:21 —

²²But if it manifestly spread over the skin, then the priest shall pronounce him unclean: it is a plague of leprosy; it has broken out in the ulcer.

²³But if the bright spot should remain in its place and not spread, it is the scar of the ulcer; and the priest shall pronounce him clean.