Leviticus 21:10-12

10And the high priest among his brethren, on whose head the anointing oil was poured, and who is consecrated to put on the garments, shall not uncover his head, nor rend his garments.

11Neither shall he come near any person dead, nor make himself unclean for his father and for his mother;

12neither shall he go out of the sanctuary, nor profane the sanctuary of his 1God; for the consecration of the anointing oil of his 2God is upon him: I am Jehovah.