1 Chronicles 19:7-9

7They hired thirty-two thousand chariots and charioteers, as well as the king of Maakah with his troops, who came and camped near Medeba, while the Ammonites were mustered from their towns and moved out for battle.

8On hearing this, David sent Joab out with the entire army of fighting men.

9The Ammonites came out and drew up in battle formation at the entrance to their city, while the kings who had come were by themselves in the open country.