Numbers 36:7-9

Amplified Bible

⁷ So 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). ⁸ Every 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). ⁹ So no inheritance shall be transferred from one tribe to another, but each of the tribes of the Israelites shall hold to its own inheritance.”