Leviticus 21:10–15

The high priest, that is to say, the priest who is the greatest among his brethren, upon whose head the oil of unction hath been poured; and whose hands have been consecrated for the priesthood; and who hath been vested with the holy vestments. He shall not uncover his head: he shall not rend his garments. 11Nor shall he go in at all to any dead person: not even for his father, or his mother, shall he be defiled. 12Neither shall he go out of the holy places, lest he defile the sanctuary of the Lord: because the oil of the holy unction of his God is upon him. I am the Lord. 13He shall take a virgin unto his wife. 14But a widow or one that is divorced, or defied, or a harlot, he shall not take: but a maid of his own people. 15He shall not mingle the stock of his kindred with the common people of this nation: for I am the Lord who sanctify him.