Leviticus 13:25-27

New Catholic Bible

²⁵ then the priest shall examine it. If the hair of the spot has turned white and it appears to be deeper than the skin, then it is leprosy. It has broken out of the burn. The priest shall declare him unclean, for it is a leprous sore. ²⁶ But if the priest examines it and there is no white hair on the spot and it is not deeper than the skin, but is a bit darker, then the priest shall quarantine him for seven days. ²⁷ On the seventh day the priest shall examine him again. If it has spread over the skin, then the priest shall pronounce him to be unclean. It is a leprous sore.