Leviticus 13:7-11

“But if the rash spreads farther on the skin after he has shown himself to the priest for his cleansing, he shall appear again to the priest.

And the priest shall look, and if the rash has spread on the skin, then the priest shall pronounce him unclean; it is leprosy.

“When the infection of leprosy is on someone, then he shall be brought to the priest.

The priest shall then look, and if there is a white swelling on the skin, and it has turned the hair white, and there is new raw flesh in the swelling,

it is a chronic leprosy on the skin of his body, and the priest shall pronounce him unclean; he shall not isolate him, for he is unclean.