Leviticus 21:6-8

6They must be holy to their God and must not profane the name of their God. Because they present the food offerings to the Lord, the food of their God, they are to be holy.

7“ ‘They must not marry women defiled by prostitution or divorced from their husbands, because priests are holy to their God.

8Regard them as holy, because they offer up the food of your God. Consider them holy, because I the Lord am holy—I who make you holy.