The Lord said to Moses: Speak to the priests, the sons of Aaron, and say to them: None shall defile himself for any [dead] person among his kin, except for the relatives that are closest to him: his mother, his father, his son, his daughter, and his brother; also for a virgin sister, close to him because she has not married, for her he may defile himself. But he shall not defile himself as a kinsman by marriage, and so profane himself.
They shall not shave smooth any part of their heads, or cut the side-growth of their beards, or make gashes in their flesh. 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, and so must be holy.
They shall not marry a woman defiled by harlotry, nor shall they marry one divorced from her husband. For they are holy to their God and you must treat them as holy, since they offer the food of your God; they shall be holy to you, for I the Lord who sanctify you am holy. When the daughter of a priest defiles herself through harlotry, it is her father whom she defiles; she shall be put to the fire.
The priest who is exalted above his fellows, on whose head the anointing oil has been poured and who has been ordained to wear the vestments, shall not bare his head or rend his vestments. He shall not go in where there is any dead body; he shall not defile himself even for his father or mother. He shall not go outside the sanctuary and profane the sanctuary of his God, for upon him is the distinction of the anointing oil of his God, Mine the Lord's. He may marry only a woman who is a virgin. A widow, or a divorced woman, or one who is degraded by harlotry--such he may not marry. Only a virgin of his own kin may he take to wife--that he may not profane his offspring among his kin, for I the Lord have sanctified him.