Leviticus 13:29-33

29“When a man or woman has a condition on the head or chin,

30the priest is to examine the condition. If it appears to be deeper than the skin, and the hair in it is yellow and sparse, the priest must pronounce the person unclean. It is a scaly outbreak, a serious skin disease of the head or chin.

31When the priest examines the scaly condition, if it does not appear to be deeper than the skin, and there is no black hair in it, the priest will quarantine the person with the scaly condition for seven days.

32The priest will reexamine the condition on the seventh day. If the scaly outbreak has not spread and there is no yellow hair in it and it does not appear to be deeper than the skin,

33the person is to shave himself but not shave the scaly area. Then the priest will quarantine the person who has the scaly outbreak for another seven days.