Numbers 6:7

6:7 He must not defile himself even for his father or his mother or his brother or his sister if they die, because the separation for his God is on his head.

Numbers 36:2

36:2 They said, “The Lord commanded my lord to give the land as an inheritance by lot to the Israelites; and my lord was commanded by the Lord to give the inheritance of our brother Zelophehad to his daughters.