Leviticus 13:6-11
English Standard Version
Chapter 13
6And the priest shall examine him again on the seventh day, and if the diseased area has faded and the disease has not spread in the skin, then the priest shall pronounce him clean; it is only an eruption. And he shall wash his clothes and be clean. 7But if the eruption spreads in the skin, after he has shown himself to the priest for his cleansing, he shall appear again before the priest. 8And the priest shall look, and if the eruption has spread in the skin, then the priest shall pronounce him unclean; it is a leprous disease.
9"When a man is afflicted with a leprous disease, he shall be brought to the priest,
10and the priest shall look. And if there is a white swelling in the skin that has turned the hair white, and there is raw flesh in the swelling,
11it is a chronic leprous disease in the skin of his body, and the priest shall pronounce him unclean. He shall not shut him up, for he is unclean.