Leviticus 13:12-13

12If the leprosy breaks out farther on the skin, and the leprosy covers all the skin of him 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 all his 2body, he shall pronounce clean him who has the infection; it has all turned white and he is clean.