Numbers 35
24 Ref Then let the meeting of the people be judge between the man responsible for the death and him who has the right of punishment for blood, acting by these rules:
25 Ref And let the people keep the man responsible for the death safe from the hands of him who has the right of punishment for blood, and send him back to his safe town where he had gone in flight: there let him be till the death of the high priest who was marked with the holy oil.
26 But if ever he goes outside the walls of the safe town where he had gone in flight,
27 Ref And the giver of punishment, meeting him outside the walls of the town, puts him to death, he will not be responsible for his blood: