Numbers 36:5-7

5The Lord gave Moses his answer. So Moses gave this command to the Israelites: ‘What Joseph's descendants are saying is right.

6This is what the Lord has commanded about the daughters of Zelophehad: Let them marry men that they want to marry. But they must marry men from the clans of their father's tribe.

7If they do that, each tribe will keep the land that has been given to their ancestors. None of their land will go to another tribe.