Numbers 35:16-24, 30-31

‘But if he struck him down with an iron object, so that he died, he is a murderer; the murderer shall surely be put to death. If he struck him down with a stone in the hand, by which he will die, and as a result he died, he is a murderer; the murderer shall surely be put to death. Or if he struck him with a wooden object in the hand, by which he might die, and as a result he died, he is a murderer; the murderer shall surely be put to death. The blood avenger himself shall put the murderer to death; he shall put him to death when he meets him. If he pushed him of hatred, or threw something at him lying in wait and as a result he died, or if he struck him down with his hand in enmity, and as a result he died, the one who struck him shall surely be put to death, he is a murderer; the blood avenger shall put the murderer to death when he meets him. ‘But if he pushed him suddenly without enmity, or threw something at him without lying in wait, or with any deadly object of stone, and without seeing it dropped on him so that he died, while he was not his enemy nor seeking his injury, then the congregation shall judge between the slayer and the blood avenger according to these ordinances.

‘If anyone kills a person, the murderer shall be put to death at the evidence of witnesses, but no person shall be put to death on the testimony of one witness. Moreover, you shall not take ransom for the life of a murderer who is guilty of death, but he shall surely be put to death.