Leviticus 21:4-6 Holman Christian Standard Bible (HCSB)
4 He is not to make himself unclean for those related to him by marriage[a] and so defile himself.
5 “Priests may not make bald spots on their heads, shave the edge of their beards, or make gashes on their bodies. 6 They are to be holy to their God and not profane the name of their God. For they present the fire offerings to Yahweh, the food of their God, and they must be holy.