Deuteronomy 19:10-11

CLV(i) 10 Thus within your land that Yahweh your Elohim is giving to you as an allotment, the blood of the innocent shall not be shed so that no guilt of bloodshed comes to be on you. 11 But if a man is hating his associate, and he waits in ambush for him, rises against him and smites his soul so that he dies, and he flees to one of these cities,