Numbers 35:19-34
19 The avenger of blood shall put the murderer to death; when he meets him, he shall put him to death.
20 If anyone with malice aforethought shoves another or throws something at him intentionally so that he dies
21 or if in hostility he hits him with his fist so that he dies, that person shall be put to death; he is a murderer. The avenger of blood shall put the murderer to death when he meets him.
22 “‘But if without hostility someone suddenly shoves another or throws something at him unintentionally
23 or, without seeing him, drops a stone on him that could kill him, and he dies, then since he was not his enemy and he did not intend to harm him,
24 the assembly must judge between him and the avenger of blood according to these regulations.
25 The assembly must protect the one accused of murder from the avenger of blood and send him back to the city of refuge to which he fled. He must stay there until the death of the high priest, who was anointed with the holy oil.
26 “‘But if the accused ever goes outside the limits of the city of refuge to which he has fled
27 and the avenger of blood finds him outside the city, the avenger of blood may kill the accused without being guilty of murder.
28 The accused must stay in his city of refuge until the death of the high priest; only after the death of the high priest may he return to his own property.
29 “‘These are to be legal requirements for you throughout the generations to come, wherever you live.
30 “‘Anyone who kills a person is to be put to death as a murderer only on the testimony of witnesses. But no one is to be put to death on the testimony of only one witness.
31 “‘Do not accept a ransom for the life of a murderer, who deserves to die. He must surely be put to death.
32 “‘Do not accept a ransom for anyone who has fled to a city of refuge and so allow him to go back and live on his own land before the death of the high priest.
33 “‘Do not pollute the land where you are. Bloodshed pollutes the land, and atonement cannot be made for the land on which blood has been shed, except by the blood of the one who shed it.
34 Do not defile the land where you live and where I dwell, for I, the Lord, dwell among the Israelites.’”