Numbers 35:16-18

“ ‘If anyone strikes someone a fatal blow with an iron object, that person is a murderer; the murderer is to be put to death. 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. 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.