Leviticus 13:12-13

12If the leprosy breaks out farther on the skin, and the leprosy covers all the skin of the person who has the infection from his head even to his feet, 1as far as the priest can see,

13then the priest shall look, and behold, if the leprosy has covered his entire 2body, he shall pronounce the one who has the infection clean; it has all turned white and he is clean.