Leviticus 13:30-37

30the priest shall examine the diseased place; if it appears to be deeper than the skin, with yellow, thin hair in it, the priest shall pronounce him unclean; it is a scale, it is leprosy of the head or beard.

31But if the priest examines the spot infected by the scale, and it does not appear deeper than the skin and there is no black hair in it, the priest shall isolate the person with the scaly infection for seven days.

32On the seventh day the priest shall examine the diseased spot; if the scale has not spread and has no yellow hair in it, and the scale does not look deeper than the skin,

33then he shall shave himself, but he shall not shave the scale; and the priest shall isolate the person with the scale for seven more days.

34Then on the seventh day the priest shall look at the scale; if the scale has not spread on the skin and appears to be no deeper than the skin, the priest shall pronounce him clean; he shall wash his clothes and be clean.

35But if the scale spreads farther on the skin after his cleansing,

36then the priest shall examine him, and if the scale has spread on the skin, the priest need not look for the yellowish hair; he is unclean.

37If, in the priest’s estimation, the scale has remained [without spreading], and black hair has grown in it, the scale is healed; he is clean, and the priest shall pronounce him clean.