Leviticus 13:29–37

²⁹“If a man or woman has a sore on the head or the beard, ³⁰then the priest shall examine the sore; and indeed if it appears deeper than the skin, and there is in it thin yellow hair, then the priest shall pronounce him unclean. It is a scaly leprosy of the head or beard. ³¹But if the priest examines the scaly sore, and indeed it does not appear deeper than the skin, and there is no black hair in it, then the priest shall isolate the one who has the scale seven days. ³²And on the seventh day the priest shall examine the sore; and indeed if the scale has not spread, and there is no yellow hair in it, and the scale does not appear deeper than the skin, ³³he shall shave himself, but the scale he shall not shave. And the priest shall isolate the one who has the scale another seven days. ³⁴On the seventh day the priest shall examine the scale; and indeed if the scale has not spread over the skin, and does not appear deeper than the skin, then the priest shall pronounce him clean. He shall wash his clothes and be clean. ³⁵But if the scale should at all spread over the skin after his cleansing, ³⁶then the priest shall examine him; and indeed if the scale has spread over the skin, the priest need not seek for yellow hair. He is unclean. ³⁷But if the scale appears to be at a standstill, and there is black hair grown up in it, the scale has healed. He is clean, and the priest shall pronounce him clean.