Numbers 36:7-9

7So no inheritance of the Israelites shall be transferred from tribe to tribe, for every one of the Israelites shall hold to the inheritance of the tribe of his fathers (tribal ancestors).

8Every daughter who possesses an inheritance [of land] in any one of the tribes of the Israelites shall marry [only] a man whose family is of her father’s tribe, so that the Israelites may each possess the inheritance of his fathers (tribal ancestors).

9So no inheritance shall be transferred from one tribe to another, but each of the tribes of the Israelites shall hold to its own inheritance.”