Leviticus 21:8

5 They 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.

6 Let 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.

7 They 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.

8 And he is to be holy in your eyes, for by him the bread of your God is offered; he is to be holy in your eyes, for I the Lord, who make you holy, am holy.

9 And if the daughter of a priest makes herself common and by her loose behaviour puts shame on her father, let her be burned with fire.

10 And he who is the chief priest among his brothers, on whose head the holy oil has been put, who is marked out to put on the holy robes, may not let his hair go loose or have his clothing out of order as a sign of sorrow.

11 He may not go near any dead body or make himself unclean for his father or his mother;