Leviticus 21:10-15

“The priest who is chief among his brothers, on whose head the anointing oil is poured and who has been consecrated to wear the garments, shall not let the hair of his head hang loose nor tear his clothes. He shall not go in to any dead bodies nor make himself unclean, even for his father or for his mother. He shall not go out of the sanctuary, lest he profane the sanctuary of his God, for the consecration of the anointing oil of his God is on him: I am the LORD. And he shall take a wife in her virginity. A widow, or a divorced woman, or a woman who has been defiled, or a prostitute, these he shall not marry. But he shall take as his wife a virgin of his own people, that he may not profane his offspring among his people, for I am the LORD who sanctifies him.”