Numbers 6:7
Neither for his father nor for his mother nor for his brother nor for his sister, shall he make himself unclean-not even for them, should they die, - because, his separation unto God, is upon his head,
Numbers 9:6
But so it was that there were, certain men who had become unclean by a dead person, and could not keep the passover on that day, - therefore came they near before Moses and before Aaron on that day.
Leviticus 21:1-2
And Yahweh said unto Moses, Say unto the priests, the sons of Aaron, - yea thou shalt say unto them, For a dead person, shall no one make himself unclean among his people:
Leviticus 21:10-12
And, as for the high priest from among his brethren upon whose head is poured the anointing oil, and who is installed, by putting on the garments, His head, shall he not bare, And, his garments, shall he not rend;
Ezekiel 44:25
And unto no dead person, shall they go in. to defile themselves,- Save that for father or for mother or for son or for daughter, for brother or for sister who hath belonged to no husband they may defile themselves.