1 Chronicles 19:6-7

When the sons of Ammon saw that they had made themselves odious to David, Hanun and the sons of Ammon sent 1,000 talents of silver to hire for themselves chariots and horsemen from Mesopotamia, from Aram-maacah and from Zobah. So they hired for themselves 32,000 chariots, and the king of Maacah and his people, who came and camped before Medeba. And the sons of Ammon gathered together from their cities and came to battle.