Numbers 35:25-27

Amplified Bible

²⁵ The congregation shall rescue the offender from the hand of the blood avenger and return him to his city of refuge, [the place] to which he had escaped; and he shall live there until the death of the high priest who was anointed with the sacred oil. ²⁶ But if at any time the one guilty of manslaughter comes outside the border of his city of refuge to which he fled, ²⁷ and the blood avenger finds him outside the border of his city of refuge and kills the offender, the blood avenger will not be guilty of murder,