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 center north and south (Num. 21:13-28; Num. 22:36; Deut. 2:24, 36; Judg. 11:13-26; Isa. 16:2: Jer. 48:20).