Hesabu 35 : 23 Numbers chapter 35 verse 23

au kwa jiwe liwalo lote, ambalo kwa kupigwa kwalo humkini mtu kufa, asipomwona, akamtupia hata akafa, naye hakuwa adui yake, wala hakumtakia madhara;
soma Mlango wa 35

or with any stone, by which a man may die, not seeing him, and cast it on him, so that he died, and he was not his enemy, neither sought his harm;