Leviticus 13:14-17 American Standard Version (ASV)

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.

Leviticus 13