(1.) Applied to small streams, as the Arnon, Jabbok, etc. Isaiah (15:7) speaks of the "book of the willows," probably the Wady-el-Asha.
(2.) It is also applied to winter torrents (Job 6:15; Numbers 34:5; Joshua 15:4, 47), and to the torrent-bed or wady as well as to the torrent itself (Numbers 13:23; 1 Kings 17:3).
(3.) In Isaiah 19:7 the river Nile is meant, as rendered in the Revised Version.