Leviticus 13:22

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.

²¹But if the priest look, and behold there is no white hair on it, and it be not below the skin of the flesh, and it be dark-colored; then the priest shall separate him seven days.

— Leviticus 13:22 —

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.

²⁴And if the flesh be in his skin in a state of fiery inflammation, and there should be in his skin the part which is healed of the inflammation, bright, clear, and white, suffused with red or very white;