He may not make himself unclean for his father or his mother, his sister or his brother, if death comes to them; because he is under an oath to keep himself separate for God.
They are not to come near any dead person so as to become unclean: but for a father or mother or son or daughter or brother or for a sister who has no husband, they may make themselves unclean.
And there were certain men who were unclean because of a dead body, so that they were not able to keep the Passover on that day; and they came before Moses and before Aaron on that day: