Leviticus 13:31-33

New Revised Standard Version, Anglicised

³¹ If 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. ³² On 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.