Leviticus 13:14-15, 24

But whensoever raw flesh appeareth in him, he shall be unclean. And the priest shall look on the raw flesh, and pronounce him unclean: the raw flesh is unclean: it is leprosy.

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