Ravine or wady with its mountain torrent, which formed the border between Moab and Ammon, now known as Wady Mojib. It has sources both north and south which unite, and its stream running nearly east and west, rushes through a deep ravine and falls into the Dead Sea at about its centre north and south. Numbers 21:13-28; Numbers 22:36; Deuteronomy 2:24,36; Judges 11:13-26; Isaiah 16:2; Jeremiah 48:20; etc.