Numbers 36:6-9

6This is the word that Adonai commands for the daughters of Zelophehad saying: They may become wives to whomever they please, as long as they marry within the family of the tribe of their father.

7So no inheritance may be passed from tribe to tribe among Bnei-Yisrael—each one of Bnei-Yisrael will each keep the inheritance of the tribe of his ancestors.

8Every daughter receiving an inheritance in one of the tribes of Bnei-Yisrael should marry within the family of her father’s tribe, so that Bnei-Yisrael will each possess the inheritance of his fathers.

9No inheritance may pass from tribe to another tribe, for each tribe of Bnei-Yisrael is to keep its inheritance.”