Numbers 35:16–18
16 d“But if he struck him down with an iron object, so that he died, he is a murderer. The murderer shall be put to death. 17 And if he struck him down with a stone tool that could cause death, and he died, he is a murderer. The murderer shall be put to death. 18 Or if he struck him down with a wooden tool that could cause death, and he died, he is a murderer. The murderer shall be put to death.
Numbers 35:21
21 or in enmity struck him down with his hand, so that he died, then he who struck the blow shall be put to death. He is a murderer. eThe avenger of blood shall put the murderer to death when he meets him.