Leviticus 13:22

19 and a white swelling or a reddish-white spot develops where the boil was, he must present himself to the priest.

20 The priest shall examine it, and if it appears to be beneath the skin and the hair in it has turned white, the priest shall pronounce him unclean; it is a diseased infection that has broken out in the boil.

21 But when the priest examines it, if there is no white hair in it, and it is not beneath the skin and has faded, the priest shall isolate him for seven days.

22 If it spreads any further on the skin, the priest must pronounce him unclean; it is an infection.

23 But if the spot remains unchanged and does not spread, it is only the scar from the boil, and the priest shall pronounce him clean.

24 When there is a burn on someone’s skin and the raw area of the burn becomes reddish-white or white,

25 the priest must examine it. If the hair in the spot has turned white and the spot appears to be deeper than the skin, it is a disease that has broken out in the burn. The priest must pronounce him unclean; it is a diseased infection.