Numbers 35:19-32 - Laws About Murder And Accidental Killing
19 The blood avenger himself will put the killer to death; he must put him to death when meeting him. 20 If he shoves him in hatred, or he throws something at him with intention, and he dies, 21 or if he hits him in hostility with his hand, and he dies, the one that struck him will put to death the killer when meeting him.
22 " 'Or if in an instant he shoved him, not in hostility, or threw something at him without intention, 23 or with any stone, without seeing it dropped on him so that he dies, while [he was] not seeking his injury, 24 then the community will judge between the striker and between the blood avenger according to these ordinances. 25 The community will deliver the killer from the hand of the blood avenger, and the community will restore him to the city of his refuge to which he fled; and he will live there in it until the death of the high priest who was anointed with holy oil.
26 But if the killer surely goes out of the territory of the city of his refuge to which he fled, 27 and the blood avenger finds him outside the territory of the city of his refuge, and the blood avenger kills the killer, {he will not be guilty of blood} 28 because he must live in the city of his refuge until the death of the high priest. But after the death of the high priest the killer will return to the land of his property. 29 These things will be as a decree of justice for you for your generations in all your dwellings.
30 " 'If anyone kills a person, the killer will be put to death {according to the testimony} of witnesses, but someone cannot die on testimony of one person. 31 Also, you will not take a ransom payment for the life of a killer who [is] guilty of death; indeed, he must surely be put to death. 32 You will not take a ransom payment for the one that flees to the city of his refuge, so that he may return to live in the land before the death of the priest.