Numbers 36:1-3

Now the heads of the fathers’ households of the family of the sons of Gilead, the son of Machir, the son of Manasseh, of the families of the sons of Joseph, came forward and spoke before Moses and before the leaders, the heads of the fathers’ households of the sons of Israel,

and they said, “The Lord commanded my lord to give the land by lot to the sons of Israel as an inheritance, and my lord was commanded by the Lord to give the inheritance of our brother Zelophehad to his daughters.

But if they marry one of the sons of the other tribes of the sons of Israel, their inheritance will be withdrawn from the inheritance of our fathers and will be added to the inheritance of the tribe to which they belong; so it will be withdrawn from our allotted inheritance.