Leviticus 13:40-44

40And if a man's hair have fallen off his head, he is bald: he is clean;

41and if he have the hair fallen off from the part of the head towards his face, he is forehead-bald: he is clean.

42And if there be in the bald head, or bald forehead, a white-reddish sore, it is a leprosy which hath broken out in his bald head, or his bald forehead.

43And the priest shall look on it, and behold, the rising of the sore is white-reddish in his bald head, or in his bald forehead, like the appearance of the leprosy in the skin of the flesh;

44he is a leprous man, he is unclean; the priest shall pronounce him utterly unclean; his sore is in his head.