Leviticus 21:10-15 - Rules For The High Priest

¹⁰ He that is the high priest among his brethren, upon whose head the anointing oil was poured and whose hand was filled to put on the vestments, shall not uncover his head nor rent his clothes, ¹¹ neither shall go to any dead body nor make himself unclean: no not on his father or mother, ¹² neither shall go out of the sanctuary, that he pollute not the holy place of his God, for the crown of the anointing oil of God, is upon him. I am the LORD.

¹³ "'He shall take a maiden unto his wife: ¹⁴ but no widow nor divorced nor polluted whore. But he shall take a maiden of his own people to wife, ¹⁵ that he defile not his seed upon his people. For I am the LORD which sanctify him.'"