Leviticus 13
34 Ref And on the seventh day the priest will see the place: and if it is not increased, and does not seem to go deeper than the skin, the priest will say that he is clean: and after his clothing has been washed he will be clean.
35 Ref But if the disease in his skin becomes worse after he has been made clean,
36 Then the priest is to see him: and if the mark is increased, the priest, without looking for the yellow hair, will say that he is unclean.
37 But if, in his opinion, the growth is stopped, and black hair has come up on it, the disease has gone; he is clean and the priest will say that he is clean.