Numbers 35:26-28

TKJU(i) 26 But if the slayer shall at any time come outside the border of the city of his refuge, where he had fled; 27 and the revenger of blood find him outside the borders of the city of his refuge, and the revenger of blood kill the slayer; he shall not be guilty of blood: 28 Because he should have remained in the city of his refuge until the death of the high priest: But after the death of the high priest the slayer shall return into the land of his possession.