Leviticus 21:9

6 They shall be holy to their God, and shall not profane his name. For they offer the burnt offering of the Lord, and the bread of their God: and therefore they shall be holy.

7 They shall not take to wife a harlot or a vile prostitute, nor one that has been put away from her husband: because they are consecrated to their God,

8 And offer the loaves of proposition. Let them therefore be holy because I also am holy: the Lord, who sanctify them.

9 If the daughter of a priest be taken in whoredom and dishonour the name of her father, she shall be burnt with fire.

10 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.

11 Nor shall he go in at all to any dead person: not even for his father, or his mother, shall he be defiled.

12 Neither 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.