Neither for his father nor for his mother, nor for brother or sister, if they die, shall he make himself unclean; because his separation to God is upon his head.
They shall not defile themselves by going near to a dead person; however, for father or mother, for son or daughter, for brother or unmarried sister they may defile themselves.
And there were certain men who were unclean through touching the dead body of a man, so that they could not keep the passover on that day; and they came before Moses and Aaron on that day;