Numbers 35:15-17

Complete Jewish Bible

¹⁵ These six cities will serve as refuge for the people of Isra’el, as well as for the foreigner and resident alien with them; so that anyone who kills someone by mistake may flee there.

¹⁶ “‘However, if he hits him with an iron implement and thus causes his death, he is a murderer; the murderer must be put to death. ¹⁷ Or if he hits him with a stone in his hand big enough to kill someone, and he dies, he is a murderer; the murderer must be put to death.