1 Chronicles 19:10-15

10Joab saw that there were battle lines in front of him and behind him; so he selected some of the best troops in Israel and deployed them against the Arameans.

11He put the rest of the men under the command of Abishai his brother, and they were deployed against the Ammonites.

12Joab said, “If the Arameans are too strong for me, then you are to rescue me; but if the Ammonites are too strong for you, then I will rescue you.

13Be strong, and let us fight bravely for our people and the cities of our God. The Lord will do what is good in his sight.”

14Then Joab and the troops with him advanced to fight the Arameans, and they fled before him.

15When the Ammonites realized that the Arameans were fleeing, they too fled before his brother Abishai and went inside the city. So Joab went back to Jerusalem.