Deuteronomy 19:10-12

Complete Jewish Bible

¹⁰ so that innocent blood will not be shed in the land Adonai your God is giving you as an inheritance, and thus blood guilt be on you.

¹¹ “However, if someone hates his fellow member of the community, lies in wait for him, attacks him, strikes him a death blow, and then flees into one of these cities; ¹² then the leaders of his own town are to send and bring him back from there and hand him over to the next-of-kin avenger, to be put to death.