Numbers 36:6-9

6This is what the Lord has commanded concerning Zelophehad’s daughters: They may marry anyone they like provided they marry within a clan of their ancestral tribe.

7No inheritance belonging to the Israelites is to transfer from tribe to tribe, because each of the Israelites is to retain the inheritance of his ancestral tribe.

8Any daughter who possesses an inheritance from an Israelite tribe must marry someone from the clan of her ancestral tribe, so that each of the Israelites will possess the inheritance of his fathers.

9No inheritance is to transfer from one tribe to another, because each of the Israelite tribes is to retain its inheritance.”