Leviticus 13:6-8

New International Version

⁶ On the seventh day the priest is to examine them again, and if the sore has faded and has not spread in the skin, the priest shall pronounce them clean;^(A) it is only a rash. They must wash their clothes,^(B) and they will be clean.^{(C) 7} But if the rash does spread in their skin after they have shown themselves to the priest to be pronounced clean, they must appear before the priest again.^{(D) 8} The priest is to examine that person, and if the rash has spread in the skin, he shall pronounce them unclean; it is a defiling skin disease.