Leviticus 13:30

the priest shall examine the disease . And if it appears deeper than the skin , and the hair in it is yellow and thin , then the priest shall pronounce him unclean . It is an itch , a leprous disease of the head or the beard .

the priest is to examine the sore, and if it appears to be more than skin deep and the hair in it is yellow and thin, the priest shall pronounce them unclean; it is a defiling skin disease on the head or chin.

Then the priest shall see the plague : and, behold, if it be in sight deeper than the skin; and there be in it a yellow thin hair; then the priest shall pronounce him unclean : it is a dry scall, even a leprosy upon the head or beard.