Vayikra 13:21-23

Orthodox Jewish Bible

²¹ But if the kohen examine it, and, hinei, there be no white hair therein, and if it be not deeper than the skin, but be somewhat faded, then the kohen shall quarantine him shivat yamim;

²² And if it spread much abroad in the skin, then the kohen shall pronounce him tamei; it is a nega.

²³ But if the bright spot stay in its place, and spread not, it is a burning boil; and the kohen shall pronounce him tahor.