2 Samuel 10:11-19

Joab said [to Abishai], “If the Arameans are too strong for me, then you shall help me; but if the Ammonites are too strong for you, I will come to help you. Be courageous, and let us show ourselves courageous for the benefit of our people and the cities of our God. And may the LORD do what is good in His sight.” So Joab and the people who were with him approached the battle against the Arameans, and they fled before him. When the Ammonites saw that the Arameans had fled, they also fled before Abishai and entered the city. So Joab returned from battling against the Ammonites and came to Jerusalem. When the Arameans saw that they were defeated by Israel, they gathered together. Hadadezer 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. When 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. But 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. When 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.