Leviticus 13:24-28

24“Or suppose the body has a burn from fire on its skin, and the raw flesh of the burn becomes a bright spot, reddish-white, or white.

25Then the kohen is to examine it, and behold, if the hair in the bright spot has turned white and its appearance is deeper than the skin, it is tza'arat. It has broken out in the burning, and the kohen is to pronounce him unclean—it is the plague of tza'arat.

26But if the kohen examines it and sees there is no white hair in the bright spot, and it is not lower than the skin but is faded, then the kohen is to isolate him seven days.

27The kohen is to examine him on the seventh day. If it has spread in the skin, then the kohen is to pronounce him unclean. It is the plague of tza'arat.

28If the bright spot stays in its place, and has not spread in the skin but is faded, it is the swelling from the burn, and the kohen shall pronounce him clean, for it is merely a scar from the burn.