Numbers 36:7-9

7In this way no land of the Israelites will pass from one tribe to another. Every Israelite must keep the tribal land inherited from his ancestors.

8A woman who inherits land in any of the tribes of Israel may marry a man from any family in her ancestor’s tribe. In this way every Israelite keeps the land inherited from his ancestors.

9No land may pass from one tribe to another. Each Israelite tribe must keep the land it inherits.”