1 Kings 11:23,24

Which fled from his lord Hadadezer When David had defeated him. King of Zobah A part of Syria, between Damascus and Euphrates. And he gathered men unto him Some of those that fled when David defeated Hadadezer, 2 Samuel 10:18. And became captain over a band Who listed themselves under him as their commander, with others, who readily joined them, and lived by robbery, as many Arabians did. And they went to Damascus And took it while Solomon was wallowing in luxury: David had put a garrison into Damascus, and brought the people under tribute, 2 Samuel 8:5; and so they probably continued during his life, and were subject to Solomon after his death, till that prince, doting upon strange women, minded not the defence of his conquests. This Rezon took advantage of, and invaded and got possession of Damascus, and reigned there, as Hadad did in Edom.