2 Samuel 10:16-19

16Hadadezer sent word and brought out the Arameans who were beyond the River [Euphrates]; and they came to Helam; and Shobach the commander of the army of Hadadezer led them.

17When David was informed, he gathered all Israel together and crossed the Jordan, and came to Helam. Then the Arameans assembled in battle formation to meet David and fought against him.

18But the Arameans fled before Israel, and David killed 700 Aramean charioteers and 40,000 horsemen, and struck Shobach the commander of their army, and he died there.

19When all the kings serving Hadadezer saw that they had been defeated by Israel, they made peace with Israel and served them. So the Arameans (Syrians) were afraid to help the Ammonites anymore.