|Easton's Bible Dictionary|
(Numbers 21:14, marg.; also R.V.), a place at the south-eastern corner of the Dead Sea, the Ghor es-Safieh. This name is found in an ode quoted from the "Book of the Wars of the Lord," probably a collection of odes commemorating the triumphs of God's people (Comp. 21:14, 17, 18, 27-30).
Int. Standard Bible Encyclopedia
soo'-fa (suphah, for wahebh becuphah; Septuagint reads ten Zoob ephlogise; the King James Version Rea Sea): Suphah is the region in which Vaheb is situated (Numbers 21:14). It is probably identical with Suph of Deuteronomy 1:1. Tristram (Land of Moab, 50) suggested identification with Ghor es-Safiyeh, a small oasis East of the mud fiats of Es-Sebkhah, South of the Dead Sea; but "the sibilants do not correspond, and Safiyeh is a specifically Arabic term (Wetzstein in Delitzsch, Gen4, 586, note 2) which does not seem to be a likely explanation of Suphah" (Gray, "Numbers," ICC, 285). This, and other questions of identification, must wait for solution until a more thorough exploration of the whole district has been accomplished.
Suphah (1 Occurrence)
Numbers 21:14 Therefore it is said in the book of the Wars of Yahweh, "Vaheb in Suphah, the valleys of the Arnon, (WEB JPS ASV BBE DBY YLT NAS RSV NIV)