Leviticus 21:11-15

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 defiled, 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 his nation: for I am the Lord who sanctify him.