Leviticus 21:7-9

7“Priests may not marry a woman defiled by prostitution, and they may not marry a woman who is divorced from her husband, for the priests are set apart as holy to their God.

8You must treat them as holy because they offer up food to your God. You must consider them holy because I, the Lord, am holy, and I make you holy.

9“If a priest’s daughter defiles herself by becoming a prostitute, she also defiles her father’s holiness, and she must be burned to death.