Leviticus 13:31 in the King James Version
And if the priest look on the plague of the scall, and, behold, it be not in sight deeper than the skin, and that there is no black hair in it; then the priest shall shut up him that hath the plague of the scall seven days:
Context
30 then the priest shall examine the plague; and behold, if its appearance is deeper than the skin, and the hair in it is yellow and thin, then the priest shall pronounce him unclean. It is an itch. It is leprosy of the head or of the beard.
31 If the priest examines the plague of itching, and behold, its appearance isn’t deeper than the skin, and there is no black hair in it, then the priest shall isolate the person infected with itching seven days.
32 On the seventh day the priest shall examine the plague; and behold, if the itch hasn’t spread, and there is no yellow hair in it, and the appearance of the itch isn’t deeper than the skin,