Leviticus 13:16-20

Or if the raw flesh turns back and is changed to white, then he shall come to the priest,

and the priest shall look at him, and behold, if the infected area has turned white, then the priest shall pronounce the one who has the infection clean; he is clean.

“Now when the body has a boil on its skin and it is healed,

and in the place of the boil there is a white swelling or a reddish-white, bright spot, then it shall be shown to the priest;

and the priest shall look, and behold, if it appears to be deeper than the skin, and the hair on it has turned white, then the priest shall pronounce him unclean; it is the infection of leprosy, it has broken out in the boil.