1 Chronicles 19:6-15

6And the children of Ammon saw that they had made themselves odious to David; and Hanun and the children of Ammon sent a thousand talents of silver to hire them chariots and horsemen out of Mesopotamia, and from the Syrians of Maacah, and from Zobah.

7And they hired thirty-two thousand chariots, and the king of Maacah and his people; and they came and encamped before Medeba. And the children of Ammon gathered together from their cities, and came to battle.

8And David heard [of it], and he sent Joab, and all the host, the mighty men.

9And the children of Ammon came out, and put the battle in array at the entrance of the city; and the kings that had come were by themselves on the field.

10And Joab saw that the front of the battle was against him before and behind; and he chose out of all the choice men of Israel, and put them in array against the Syrians;

11and the rest of the people he gave into the hand of Abishai his brother, and they set themselves in array against the children of Ammon.

12And he said, If the Syrians be too strong for me, then thou shalt help me; and if the children of Ammon be too strong for thee, then I will help thee.

13Be strong, and let us shew ourselves valiant for our people, and for the cities of our 1God; and Jehovah will do what is good in his sight.

14And Joab and the people that were with him drew near in front of the Syrians to the battle; and they fled before him.

15And when the children of Ammon saw that the Syrians fled, they likewise fled before Abishai his brother, and entered into the city. And Joab came to Jerusalem.