Not even for his father or for his mother, for brother or sister, if they die, shall he make himself unclean, because his separation to God is on his head.
And there were certain men who were unclean through touching a dead body, so that they could not keep the Passover on that day, and they came before Moses and Aaron on that day.
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.