Leviticus 13:29–37

²⁹“If a man or a woman has some disease on the head or chin, ³⁰the priest will examine the disease. If it looks deeper than the rest of the skin and there is thin yellow hair on it, the priest must declare the person unclean. It is a scab, a disease on the head or the chin. ³¹But if the priest examines the scabby disease and it does not look deeper than the rest of the skin and there is no black hair in it, the priest must put the person with the scabby disease in isolation for seven days. ³²On the seventh day the priest will examine the disease. If the scab has not spread, there is no yellow hair on it, and the scab does not look deeper than the rest of the skin, ³³the person will shave everything except the scab. The priest will put the person with the scab in isolation for another seven days. ³⁴On the seventh day the priest will examine the scab again. If the scab has not spread on the skin and does not look deeper than the rest of the skin, the priest must declare him clean. When he has washed his clothes, he will be clean. ³⁵But if the scab spreads after the person has been declared clean, ³⁶the priest will make another examination. If the scab has spread on the skin, the priest does not have to look for yellow hair. The person is unclean. ³⁷But if he sees that the scab hasn’t spread and black hair grows on it, the scab is healed. The person is clean, so the priest must declare him clean.