Leviticus 13:1–14

¹The Lord said to Moses and Aaron, ²“When a man has on the skin of his body a swelling or an eruption or a spot, and it turns into a leprous disease on the skin of his body, then he shall be brought to Aaron the priest or to one of his sons the priests, ³and the priest shall examine the diseased spot on the skin of his body; and if the hair in the diseased spot has turned white and the disease appears to be deeper than the skin of his body, it is a leprous disease; when the priest has examined him he shall pronounce him unclean. ⁴But if the spot is white in the skin of his body, and appears no deeper than the skin, and the hair in it has not turned white, the priest shall shut up the diseased person for seven days; ⁵and the priest shall examine him on the seventh day, and if in his eyes the disease is checked and the disease has not spread in the skin, then the priest shall shut him up seven days more; ⁶and the priest shall examine him again on the seventh day, and if the diseased spot is dim 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 make an examination, and if the eruption has spread in the skin, then the priest shall pronounce him unclean; it is leprosy.

⁹“When a man is afflicted with leprosy, he shall be brought to the priest; ¹⁰and the priest shall make an examination, and if there is a white swelling in the skin, which has turned the hair white, and there is quick 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 shut him up, for he is unclean. ¹²And if the leprosy breaks out in the skin, so that the leprosy covers all the skin of the diseased person from head to foot, so far as the priest can see, ¹³then the priest shall make an examination, and if the leprosy has covered all his body, he shall pronounce him clean of the disease; it has all turned white, and he is clean. ¹⁴But when raw flesh appears on him, he shall be unclean.