Numbers 35:15-24

ISV(i) 15 that is, places of refuge for the Israelis, the resident alien, and any travelers among them. Anyone who kills a person inadvertently may flee there.”
16 Exceptions to Eligibility“Whoever uses an iron implement to kill someone is to be adjudged a murderer, and that murderer is certainly to be put to death. 17 Furthermore, whoever uses a stone implement to kill someone is to be adjudged a murderer, and that murderer is certainly to be put to death. 18 Also, whoever uses a wooden implement to kill someone with it is to be adjudged a murderer, and that murderer is certainly to be put to death. 19 The blood avenger himself is to execute the murderer. When he meets him, the blood avenger is to put him to death. 20 If the killer shoved his victim out of hatred, or hurled something at him while waiting in ambush so that he died, 21 or if he struck him with his hand out of hatred so that he died, then the killer is certainly to be put to death for murder. The avenger of blood is to put him to death when he meets him.”
22 Case Examples for Eligibility“But if he pushed him suddenly without hatred, or if he hurled something in his direction without waiting in ambush, 23 or if he hit him with a stone carelessly so that he was fatally injured, though he isn’t his enemy and he wasn’t seeking to commit evil against him, 24 then the community is to judge between the inadvertent killer and the blood avenger, following these ordinances.