Deuteronomy 19:8-13

When GOD, your God, enlarges your land, extending its borders as he solemnly promised your ancestors, by giving you the whole land he promised them because you are diligently living the way I’m commanding you today, namely, to love GOD, your God, and do what he tells you all your life; and when that happens, then add three more to these three cities so that there is no chance of innocent blood being spilled in your land. GOD, your God, is giving you this land as an inheritance—you don’t want to pollute it with innocent blood and bring guilt upon yourselves. On the other hand, if a man with a history of hatred toward his neighbor waits in ambush, then jumps him, mauls and kills him, and then runs to one of these cities, that’s a different story. The elders of his own city are to send for him and have him brought back. They are to hand him over to the avenger of blood for execution. Don’t feel sorry for him. Clean out the pollution of wrongful murder from Israel so that you’ll be able to live well and breathe clean air. * * *