2 Samuel 10:16-19

16And Hadadezer sent and brought out the Syrians who were beyond the Euphrates. They came to Helam, with Shobach the commander of the army of Hadadezer at their head.

17And when it was told David, he gathered all Israel together and crossed the Jordan and came to Helam. The Syrians arrayed themselves against David and fought with him.

18And the Syrians fled before Israel, and David killed of the Syrians the men of 700 chariots, and 40,000 horsemen, and wounded Shobach the commander of their army, so that he died there.

19And when all the kings who were servants of Hadadezer saw that they had been defeated by Israel, they made peace with Israel and became subject to them. So the Syrians were afraid to save the Ammonites anymore.