2 Samuel 10:6-8

6When the Ammonites realized that they had become a stench to David, they hired twenty thousand Aramean foot soldiers from Beth-rehob and Zoba, as well as a thousand men from the king of Maacah and twelve thousand men from Tob.

7On hearing this, David sent Joab and the entire army of mighty men. 8The Ammonites marched out and arrayed themselves for battle at the entrance of the city gate, while the Arameans of Zobah and Rehob and the men of Tob and Maacah were by themselves in the open country.