利未記 13:3

祭司要察看肉皮上的災病，若災病處的毛已經變白，災病的現象深於肉上的皮，這便是大痲瘋的災病。祭司要察看他，定他為不潔淨。

And the priest shall look on the plague in the skin of the flesh: and when the hair in the plague is turned white, and the plague in sight be deeper than the skin of his flesh, it is a plague of leprosy: and the priest shall look on him, and pronounce him unclean.