Numbers 35:27-29

Darby Translation

²⁷ and the avenger of blood find him outside the limits of his city of refuge, and the avenger of blood kill the manslayer, there shall be no blood-guiltiness upon him;

²⁸ for the manslayer should have remained in the city of his refuge until the death of the high-priest; but after the death of the high-priest he may return into the land of his possession.

²⁹ And this shall be unto you a statute of right throughout your generations in all your dwellings.