Leviticus 13:25-27

Amplified Bible

²⁵ then the priest shall examine it, and if the hair in the bright spot has turned white, and it appears deeper than the skin, then leprosy has broken out in the burn. So the priest shall pronounce him unclean; it is the disease of leprosy. ²⁶ But if the priest examines it and there is no white hair in the bright spot and it is not deeper than [the rest of] the skin but is dull in color, then the priest shall isolate him for seven days. ²⁷ And the priest shall examine him on the seventh day; if it is spreading farther on the skin, then the priest shall pronounce him unclean; it is leprosy.