Leviticus 13:13

9“When the plague of leprosy is in a man, then he shall be brought to the priest;

10and the priest shall examine him. Behold, if there is a white swelling in the skin, and it has turned the hair white, and there is raw flesh in the swelling,

11it is a chronic leprosy in the skin of his body, and the priest shall pronounce him unclean. He shall not isolate him, for he is already unclean.

12“If the leprosy breaks out all over the skin, and the leprosy covers all the skin of the infected person from his head even to his feet, as far as it appears to the priest,

13then the priest shall examine him. Behold, if the leprosy has covered all his flesh, he shall pronounce him clean of the plague. It has all turned white: he is clean.

14But whenever raw flesh appears in him, he shall be unclean.

15The priest shall examine the raw flesh, and pronounce him unclean: the raw flesh is unclean. It is leprosy.

16Or if the raw flesh turns again, and is changed to white, then he shall come to the priest.

17The priest shall examine him. Behold, if the plague has turned white, then the priest shall pronounce him clean of the plague. He is clean.