1 Chronicles 19:10-15

10Now when Joab saw that the 1battle was set against him in front and in the rear, he selected from all the choice men of Israel and they arrayed themselves against the Arameans. 11But the remainder of the people he placed in the hand of 2Abshai his brother; and they arrayed themselves against the sons of Ammon. 12He said, “If the Arameans are too strong for me, then you shall help me; but if the sons of Ammon are too strong for you, then I will help you. 13Be strong, and let us show ourselves courageous for the sake of our people and for the cities of our God; and may the Lord do what is good in His sight.” 14So Joab and the people who were with him drew near to the battle against the Arameans, and they fled before him. 15When the sons of Ammon saw that the Arameans fled, they also fled before Abshai his brother and entered the city. Then Joab came to Jerusalem.