Leviticus 13:25

But if the bright spot stay in his place, [and] spread not, it [is] a burning boil; and the priest shall pronounce him clean.

Or if there be [any] flesh, in the skin whereof [there is] a hot burning, and the quick [flesh] that burneth have a white bright spot, somewhat reddish, or white;

But if the priest look on it, and, behold, [there be] no white hair in the bright spot, and it [be] no lower than the [other] skin, but [be] somewhat dark; then the priest shall shut him up seven days:

And the priest shall look upon him the seventh day: [and] if it be spread much abroad in the skin, then the priest shall pronounce him unclean: it [is] the plague of leprosy.