LXX Num 35:8

καὶ τὰς πόλεις ἃς δώσετε ἀπὸ τῆς κατασχέσεως υἱῶν Ἰσραήλ, ἀπὸ τῶν τὰ πολλὰ πολλά, καὶ ἀπὸ τῶν ἐλαττόνων ἐλάττω· ἕκαστος κατὰ τὴν κληρονομίαν αὐτοῦ ἣν κληρονομήσουσιν, δώσουσιν ἃ τῶν πόλεων τοῖς Λευείταις.

The cities that you apportion from the territory of the Israelites should be given to the Levites in proportion to the inheritance of each tribe: more from a larger tribe and less from a smaller one.”