The Moabites were a tribe descended from Moab, the son of Lot, born of an incestuous relationship with his oldest daughter (Genesis 19:37). From Zoar, the cradle of this tribe, on the southeastern border of the Dead Sea, they gradually spread over the region on the east of Jordan. Shortly before the Exodus, the warlike Amorites crossed the Jordan under Sihon their king and drove the Moabites out of the region between the Arnon River Valley and the Jabbok River, and occupied it, making Heshbon their capital. The Moabites were then confined to the territory to the south of the Arnon Valley (Numbers 21:26–30).