Leviticus 13:36

And in the seventh day the priest shall look on the scall: and, behold, [if] the scall be not spread in the skin, nor [be] in sight deeper than the skin; then the priest shall pronounce him clean: and he shall wash his clothes, and be clean.

But if the scall spread much in the skin after his cleansing;

But if the scall be in his sight at a stay, and [that] there is black hair grown up therein; the scall is healed, he [is] clean: and the priest shall pronounce him clean.

If a man also or a woman have in the skin of their flesh bright spots, [even] white bright spots;