Leviticus 21:11-13

¹¹He is not to go near any dead body. He must not make himself unclean, even it is for his own father or mother.

¹²He must not leave to deal with someone who has died or make the sanctuary of his God unclean because he has been dedicated by the anointing oil of his God. I am the Lord.

¹³He can only marry a virgin.