Leviticus 13:14

And if a leprosy break out abroad in the skin, and the leprosy cover all the skin of [him that hath] the plague from his head even to his foot, wheresoever the priest looketh;

Then the priest shall consider: and, behold, [if] the leprosy have covered all his flesh, he shall pronounce [him] clean [that hath] the plague: it is all turned white: he [is] clean.

And the priest shall see the raw flesh, and pronounce him to be unclean: [for] the raw flesh [is] unclean: it [is] a leprosy.

Or if the raw flesh turn again, and be changed unto white, he shall come unto the priest;