Sihon king of the Amorites, who lived in Heshbon, and ruled from Aroer, which is on the edge of the valley of the Arnon, and [the city that is in] the middle of the valley, and half Gilead, even to the river Jabbok, the border of the children of Ammon;
River Jabbok — This river has its source in the mountains of Gilead; and, running from east to west, falls into Jordan. It bounds the territories of Sihon on the north, and those of the Ammonites on the south.