7 He shall not make himself unclean for his father, or for his mother, or for his brother, or for his sister, when they die, because his separation to his God is upon his head.
Numbers 6:7 Cross References - MKJV
Leviticus 21:1-2
Leviticus 21:10-12
10 And the high priest among his brothers, on whose head the anointing oil was poured and who is consecrated to put on the garments, shall not uncover his head nor tear his clothes.
11 Neither shall he come near to any dead person, nor defile himself for his father nor for his mother.
12 Neither shall he go out of the sanctuary, nor profane the sanctuary of his God; for the crown of the anointing oil of his God is on him. I am Jehovah.
Numbers 9:6
6 And there were certain men who were defiled by the dead body of a man, so that they could not prepare the Passover on that day. And they came before Moses and before Aaron on that day.
Ezekiel 44:25
25 And he shall not come near any dead person to defile himself; but they may defile themselves for father, or for mother, or for son, or for daughter, for brother, or for sister who has had no husband.