Old Testament

Exodus 21:12-14
Laws About Injuries
12Anyone who strikes a man so that he dies must certainly be put to death. 13However, if this was not done intentionally but rather was an act of God, for that kind of case I will appoint a place among you to which that man can flee. 14But if a man plots and kills his neighbor deliberately, you shall take him from my altar, so that he may be put to death.