Numbers 35:16-19; Numbers 35:21; Numbers 35:30-31

16 “ ‘If anyone strikes someone a fatal blow with an iron object, that person is a murderer; the murderer is to be put to death. 17 Or if anyone is holding a stone and strikes someone a fatal blow with it, that person is a murderer; the murderer is to be put to death. 18 Or if anyone is holding a wooden object and strikes someone a fatal blow with it, that person is a murderer; the murderer is to be put to death. 19 The avenger of blood shall put the murderer to death; when the avenger comes upon the murderer, the avenger shall put the murderer to death.
21 or if out of enmity one person hits another with their fist so that the other dies, that person is to be put to death; that person is a murderer. The avenger of blood shall put the murderer to death when they meet.
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. They are to be put to death.