Leviticus 13:2-5

2‘A person may have a kind of mark on his skin that might be a disease. He might give the disease to other people. If he has a mark like that, you must bring him to the priest.

3The priest must look at the mark. If the hair on the mark is white, it might be a disease. If the mark is under the skin and on the skin it might be a disease. The priest must say that the person is not clean.

4If the mark on the skin is white but not under the skin it might not be a disease. If the hair on the skin is not white, it might not be a bad disease. The priest must keep him separate from the people for seven days.

5On the seventh day, the priest must look at the person. The mark may not be any bigger. If it is not, he must keep the person separate from the people for seven more days.