Leviticus 13:9

The priest shall examine him again on the seventh day. Behold, if the plague has faded and the plague hasn’t spread in the skin, then the priest shall pronounce him clean. It is a scab. He shall wash his clothes, and be clean.

But if the scab spreads on the skin after he has shown himself to the priest for his cleansing, he shall show himself to the priest again.

The priest shall examine him; and behold, if the scab has spread on the skin, then the priest shall pronounce him unclean. It is leprosy.

and 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,

it 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.

“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,