Leviticus 21:10-15

10And he that is the high priest among his brethren, upon whose head the anointing oil is poured, and that is consecrated to put on the garments, shall not let the hair of his head go loose, nor rend his clothes; 11neither shall he go in to any dead body, nor defile himself for his father, or for his mother; 12neither shall he go out of the sanctuary, nor profane the sanctuary of his God; for the crown of the anointing oil of his God is upon him: I am Jehovah. 13And he shall take a wife in her virginity. 14A widow, or one divorced, or a profane woman, a harlot, these shall he not take: but a virgin of his own people shall he take to wife. 15And he shall not profane his seed among his people: for I am Jehovah who sanctifieth him.