Leviticus 21:1-6 NRS

1 The Lord said to Moses: Speak to the priests, the sons of Aaron, and say to them: No one shall defile himself for a dead person among his relatives,
2 except for his nearest kin: his mother, his father, his son, his daughter, his brother;
3 likewise, for a virgin sister, close to him because she has had no husband, he may defile himself for her.
4 But he shall not defile himself as a husband among his people and so profane himself.
5 They shall not make bald spots upon their heads, or shave off the edges of their beards, or make any gashes in their flesh.
6 They shall be holy to their God, and not profane the name of their God; for they offer the Lord's offerings by fire, the food of their God; therefore they shall be holy.