LXX Num 35:25

καὶ ἐξελεῖται ἡ συναγωγὴ τὸν φονεύσαντα ἀπὸ τοῦ ἀγχιστεύοντος τὸ αἷμα, καὶ ἀποκαταστήσουσιν αὐτὸν ἡ συναγωγὴ εἰς τὴν πόλιν τοῦ φυγαδευτηρίου αὐτοῦ οὗ κατέφυγεν, καὶ κατοικήσῃ ἐκεῖ ἕως ἂν ἀποθάνῃ ὁ ἱερεὺς ὁ μέγας, ὃν ἔχρισαν αὐτὸν τῷ ἐλαίῳ τῷ ἁγίῳ.

The assembly is to protect the manslayer from the hand of the avenger of blood. Then the assembly will return him to the city of refuge to which he fled, and he must live there until the death of the high priest, who was anointed with the holy oil.