Hadadezer

Hadad is help; called also Hadarezer, Adod is his help, the king
of Zobah. Hanun, the king of the Ammonites, hired among others
the army of Hadadezer to assist him in his war against David.
Joab, who was sent against this confederate host, found them in
double battle array, the Ammonities toward their capital of
Rabbah, and the Syrian mercenaries near Medeba. In the battle
which was fought the Syrians were scattered, and the Ammonites
in alarm fled into their capital. After this Hadadezer went
north "to recover his border" (2 Sam. 8:3, A.V.); but rather, as
the Revised Version renders, "to recover his dominion", i.e., to
recruit his forces. Then followed another battle with the Syrian
army thus recruited, which resulted in its being totally routed
at Helam (2 Sam. 10:17). Shobach, the leader of the Syrian army,
died on the field of battle. The Syrians of Damascus, who had
come to help Hadadezer, were also routed, and Damascus was made
tributary to David. All the spoils taken in this war, "shields
of gold" and "very much brass," from which afterwards the
"brasen sea, and the pillars, and the vessels of brass" for the
temple were made (1 Chr. 18:8), were brought to Jerusalem and
dedicated to Jehovah. Thus the power of the Ammonites and the
Syrians was finally broken, and David's empire extended to the
Euphrates (2 Sam. 10:15-19; 1 Chr. 19:15-19).