Leviticus 13:13

13:13 the priest must then examine it, and if the disease covers his whole body, he is to pronounce the person with the infection clean. He has turned all white, so he is clean.

Leviticus 13:20

13:20 The priest will then examine it, and if it appears to be deeper than the skin and its hair has turned white, then the priest is to pronounce the person unclean. It is a diseased infection that has broken out in the boil.