Leviticus 13:22 in the King James Version
And if it spread much abroad in the skin, then the priest shall pronounce him unclean: it is a plague.
Context
21 But if the priest examines it, and behold, there are no white hairs in it, and it isn’t deeper than the skin, but is dim, then the priest shall isolate him seven days.
22 If it spreads in the skin, then the priest shall pronounce him unclean. It is a plague.
23 But if the bright spot stays in its place, and hasn’t spread, it is the scar from the boil; and the priest shall pronounce him clean.