Leviticus 13:29-33

29“If anyone, either a man or woman, has a sore on the head or chin,

30the priest must examine it. If he finds it is more than skin-deep and has fine yellow hair on it, the priest must pronounce the person ceremonially unclean. It is a scabby sore of the head or chin.

31If the priest examines the scabby sore and finds that it is only skin-deep but there is no black hair on it, he must quarantine the person for seven days.

32On the seventh day the priest must examine the sore again. If he finds that the scabby sore has not spread, and there is no yellow hair on it, and it appears to be only skin-deep,

33the person must shave off all hair except the hair on the affected area. Then the priest must quarantine the person for another seven days.