Joshua 20:8-9

On the other side of the Jordan, east of Jericho, they designated Bezer on the desert plateau from the tribe of Reuben, Ramoth in Gilead from the tribe of Gad, and Golan in Bashan from the tribe of Manasseh. These were the designated cities for the People of Israel and any resident foreigner living among them, so that anyone who killed someone unintentionally could flee there and not die by the hand of the avenger of blood without a fair trial before the congregation.