Numbers 35:23-25

New Century Version

²³ Or a person might drop a rock on someone he couldn’t see and kill that person. There was no plan to hurt anyone and no hatred for the one who was killed. ²⁴ If that happens, the community must judge between the relative of the dead person and the killer, according to these rules. ²⁵ They must protect the killer from the dead person’s relative, sending the killer back to the original city of safety, to stay there until the high priest dies (the high priest had the holy oil poured on him).