LXX Num 32:17

καὶ ἡμεῖς ἐνοπλισάμενοι προφυλακὴν πρότεροι τῶν υἱῶν ᾿Ισραήλ, ἕως ἄν ἀγάγωμεν αὐτοὺς εἰς τὸν ἑαυτῶν τόπον· καὶ κατοικήσει ἡ ἀποσκευὴ ἡμῶν ἐν πόλεσιν τετειχισμέναις διὰ τοὺς κατοικοῦντας τὴν γῆν.

But we will arm ourselves and be ready to go ahead of the Israelites until we have brought them into their place. Meanwhile, our little ones will remain in the fortified cities for protection from the inhabitants of the land.