Leviticus 13:4

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, athe priest shall shut up the diseased person for seven days.

Leviticus 13:18-20

18If there is in the skin of one’s body a bboil and it heals, 19and in the place of the boil there comes a white swelling or a creddish-white spot, then it shall be shown to the priest. 20And the priest shall look, and if it appears deeper than the skin and its hair has turned white, then the priest shall pronounce him unclean. It is a case of leprous disease that has broken out in the boil.
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