2 Samuel 10:8-14

The Ammonites marched out and arranged themselves in battle formation at the city gate. The Arameans of Zobah and Rehob and the men of Tob and Maacah took up a position out in the open fields. When Joab saw that he had two fronts to fight, before and behind, he took his pick of the best of Israel and deployed them to confront the Arameans. The rest of the army he put under the command of Abishai, his brother, and deployed them to confront the Ammonites. Then he said, “If the Arameans are too much for me, you help me. And if the Ammonites prove too much for you, I’ll come and help you. Courage! We’ll fight tooth and nail for our people and for the cities of our God. And GOD will do whatever he sees needs doing!” But when Joab and his soldiers moved in to fight the Arameans, they ran off in full retreat. Then the Ammonites, seeing the Arameans run for dear life, took to their heels from Abishai and went into the city. So Joab left off fighting the Ammonites and returned to Jerusalem.