LXX Num 32:29

καὶ εἶπεν πρὸς αὐτοὺς τοὺς Μωυσῆς Ἐὰν διαβῶσιν οἱ υἱοὶ Ῥουβὴν καὶ οἱ υἱοὶ Γὰδ μεθ’ ὑμῶν τὸν Ἰορδάνην, πᾶς ἐνωπλισμένος εἰς πόλεμον ἔναντι κυρίου, καὶ κατακυριεύσητε τῆς γῆς ἀπέναντι ὑμῶν, καὶ δώσετε αὐτοῖς τὴν γῆν Γαλαὰδ ἐν κατασχέσει·

And Moses said to them, “If the Gadites and Reubenites cross the Jordan with you, with every man armed for battle before the LORD, and the land is subdued before you, then you are to give them the land of Gilead as a possession.