Leviticus 21:5-7

⁵They are not to have their hair cut off for the dead, or the hair on their chins cut short, or make cuts in their flesh.

⁶Let them be holy to their God and not make the name of their God common; for the fire offerings of the Lord and the bread of their God are offered by them, and they are to be holy.

⁷They may not take as wife a loose or common woman, or one who has been put away by her husband: for the priest is holy to his God.