Numbers 35:16-18

“But if the killer has used an iron object, that’s just plain murder; he’s obviously a murderer and must be put to death. “Or if he has a rock in his hand big enough to kill and the man dies, that’s murder; he’s a murderer and must be put to death. “Or if he’s carrying a wooden club heavy enough to kill and the man dies, that’s murder; he’s a murderer and must be put to death.