Leviticus 13:24

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.

If it spreads in the skin, then the priest shall pronounce him unclean. It is a plague.

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.

then the priest shall examine it; and behold, if the hair in the bright spot has turned white, and its appearance is deeper than the skin, it is leprosy. It has broken out in the burning, and the priest shall pronounce him unclean. It is the plague of leprosy.

But if the priest examines it, and behold, there is no white hair in the bright spot, and it isn’t deeper than the skin, but has faded, then the priest shall isolate him seven days.

The priest shall examine him on the seventh day. If it has spread in the skin, then the priest shall pronounce him unclean. It is the plague of leprosy.