'High Priest' in the Bible

And the congregation shall deliver the manslayer out of the hand of the avenger of blood, and the congregation shall restore him to his city of refuge where he fled. And he shall dwell in it until the death of the high priest, who

because he should have remained in his city of refuge until the death of the high priest. But after the death of the high priest the manslayer shall return into the land of his possession.