'Wadi' in the Bible

Sihon king of the Amorites lived in Heshbon and ruled from Aroer, which is located on the edge of the Arnon River from the middle of the valley, including half of Gilead as far as Wadi Jabbok, the border of the Ammonites,

Specifically included was from Aroer on the banks of the Wadi Arnon, and the town that lies in the middle of the valley, including all the plains from Medeba to Dibon,

passing along to Azmon toward the Wadi of Egypt and ending at the sea. This will be your southern border."