Numbers 36:7-9

Living Bible

⁷ In this way none of the land of the tribe will shift to any other tribe, for the inheritance of every tribe is to remain permanently as it was first allotted. ⁸ The girls throughout the tribes of Israel who are heiresses must marry within their own tribe, so that their land won’t leave the tribe. ⁹ In this way no inheritance shall move from one tribe to another.’”