LXX Num 35:32

οὐ λήμψεσθε λύτρα τοῦ φυγεῖν εἰς πόλιν φυγαδευτηρίων, τοῦ πάλιν κατοικεῖν ἐπὶ τῆς γῆς, ἕως ἂν ἀποθάνῃ ὁ ἱερεὺς ὁ μέγας.

Nor should you accept a ransom for the person who flees to a city of refuge and allow him to return and live on his own land before the death of the high priest.