Leviticus 13:18–28

“When someone has a boil^q on their skin and it heals, and in the place where the boil was, a white swelling or reddish-white^r spot^s appears, they must present themselves to the priest. The priest is to examine it, and if it appears to be more than skin deep and the hair in it has turned white, the priest shall pronounce them unclean. It is a defiling skin disease^t that has broken out where the boil was. But if, when the priest examines it, there is no white hair in it and it is not more than skin deep and has faded, then the priest is to isolate them for seven days. If it is spreading in the skin, the priest shall pronounce them unclean; it is a defiling disease. But if the spot is unchanged and has not spread, it is only a scar from the boil, and the priest shall pronounce them clean.^u

“When someone has a burn on their skin and a reddish-white or white spot appears in the raw flesh of the burn, the priest is to examine the spot, and if the hair in it has turned white, and it appears to be more than skin deep, it is a defiling disease that has broken out in the burn. The priest shall pronounce them unclean; it is a defiling skin disease.^v But if the priest examines it and there is no white hair in the spot and if it is not more than skin deep and has faded, then the priest is to isolate them for seven days.^w On the seventh day the priest is to examine them,^x and if it is spreading in the skin, the priest shall pronounce them unclean; it is a defiling skin disease. If, however, the spot is unchanged and has not spread in the skin but has faded, it is a swelling from the burn, and the priest shall pronounce them clean; it is only a scar from the burn.^y