LXX Num 26:2

Λάβε τὴν ἀρχὴν πάσης συναγωγῆς υιῶν ᾿Ισραὴλ ἀπὸ εἰκοσαετοῦς καὶ ἐπάνω κατ’ οἴκους πατριῶν αὐτῶν, πᾶς ὁ ἐκπορευόμενος παρατάξασθαι ἐν ᾿Ισραήλ.

“Take a census of the whole congregation of Israel by the houses of their fathers—all those twenty years of age or older who can serve in the army of Israel.”