Leviticus 13:29–37

²⁹“When a man or a woman has a disease on the head or in the beard,^{* 30}the priest shall examine the disease. If it appears deeper than the skin and the hair in it is yellow and thin, the priest shall pronounce him unclean; it is an itch, a defiling disease of the head or the beard. ³¹If the priest examines the itching disease, and it appears no deeper than the skin and there is no black hair in it, the priest shall confine the person with the itching disease for seven days. ³²On the seventh day the priest shall examine the itch; if the itch has not spread and there is no yellow hair in it and the itch appears to be no deeper than the skin,^{* 33}he shall shave, but the itch he shall not shave. The priest shall confine the person with the itch for seven days more. ³⁴On the seventh day the priest shall examine the itch; if the itch has not spread in the skin and it appears to be no deeper than the skin, the priest shall pronounce him clean. He shall wash his clothes and be clean.^{* 35}But if the itch spreads in the skin after he was pronounced clean, ³⁶the priest shall examine him. If the itch has spread in the skin, the priest need not seek for the yellow hair; he is unclean.^{* 37}But if in his eyes the itch is checked and black hair has grown in it, the itch is healed; he is clean, and the priest shall pronounce him clean.