Leviticus 21:5-7

Amplified Bible

⁵ The priests ^[a]shall not shave their heads, nor shave off the edges of their beards, nor make any cuts in their body. ⁶ They shall be holy to their God and not profane the name of their God; for they present the offerings by fire to the Lord, the food of their God; so they shall be holy. ⁷ They shall not take [as a wife] a woman who is a prostitute, nor a woman who is divorced from her husband; for the priest is holy to his God.