Leviticus 13:29

²⁷And the priest shall look upon him on the seventh day; and if the spot be much spread in the skin, then the priest shall pronounce him unclean: it is a plague of leprosy, it has broken out in the ulcer.

²⁸But if the bright spot remain stationary, and be not spread in the skin, but the sore should be dark, it is a scar of inflammation; and the priest shall pronounce him clean, for it is the mark of the inflammation.

— Leviticus 13:29 —

³⁰then the priest shall look on the plague, and, behold, if the appearance of it be beneath the skin, and in it there be thin yellowish hair, then the priest shall pronounce him unclean: it is a scurf, it is a leprosy of the head or a leprosy of the beard.

³¹And if the priest should see the plague of the scurf, and, behold, the appearance of it be not beneath the skin, and there is no yellowish hair in it, then the priest shall set apart him that has the plague of the scurf seven days.