Leviticus 13:18-20

18A person might have a boil on his skin. Then it might get better.

19If there is still a red or white mark on the skin, the person must go to the priest.

20The priest must look at the person's skin. The red mark might be under the skin and the hair on the skin might be white. Then the priest must say that the person has a disease. The person is not clean.