Leviticus 13:16

13 then the priest shall look; 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.

14 But whensoever raw flesh appeareth in him, he shall be unclean.

15 And the priest shall look on the raw flesh, and pronounce him unclean: the raw flesh is unclean: it is leprosy.

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

17 and the priest shall look on him; and, behold, if the plague be turned into white, then the priest shall pronounce [him] clean [that hath] the plague: he is clean.

18 And when the flesh hath in the skin thereof a boil, and it is healed,

19 and in the place of the boil there is a white rising, or a bright spot, reddish-white, then is shall be showed to the priest;