Leviticus 13:16

13 And if the priest sees that all his flesh is covered with the leper's disease, the priest will say that he is clean: it is all turned white, he is clean.

14 But whenever diseased flesh is seen on him, he will be unclean.

15 And when the priest sees the diseased flesh he will say that he is unclean; the diseased flesh is unclean, he is a leper.

16 Or if the diseased flesh is turned again and changed to white then he is to come to the priest,

17 And the priest will see him: and if the place is turned white, then the priest will say that he is free from the disease.

18 And if a bad place has come out on the skin and is well again,

19 And on the same place there is a white growth of a bright mark, red and white, then let the priest see it;