from Aroer, that is on the edge of the valley of the Arnon, and the city that is in the middle of the valley, and all the plain of Medeba to Dibon;
Numbers 21:30; between them lay a plain, which some take to be the plain of Moab; but it rather seems to be a plain that was between these two places, and, according to Joshua 13:17, Dibon itself was in a plain.