'Cities of the Plain' in the Bible

all the cities of the plain, and all Gilead, and all Bashan, unto Salchah and Edrei, cities of the kingdom of Og in Bashan,

and all the cities of the plain, and all the kingdom of Sihon king of the Amorite, who reigned in Heshbon, whom Moses smote, with the princes of Midian, Evi, and Rekem, and Zur, and Hur, and Reba, princes of Sihon, inhabitants of the land.