Parallel
Numbers 35:28
Brenton's English Septuagint · Berean Standard Bible
For he ought to have remained in the city of refuge till the high-priest died; and after the death of the high-priest the slayer shall return to the land of his possession.
because the manslayer must remain in his city of refuge until the death of the high priest. Only after the death of the high priest may he return to the land he owns.