Passage cross-references.

And when the children of Ammon saw that they stank before David, the children of Ammon sent and hired the Syrians of Bethrehob, and the Syrians of Zoba, twenty thousand footmen, and of king Maacah a thousand men, and of Ishtob twelve thousand men.

So they went up, and searched the land from the wilderness of Zin unto Rehob, as men come to Hamath.

And Hebron, and Rehob, and Hammon, and Kanah, even unto great Zidon;

Neither did Asher drive out the inhabitants of Accho, nor the inhabitants of Zidon, nor of Ahlab, nor of Achzib, nor of Helbah, nor of Aphik, nor of Rehob:

So they hired thirty and two thousand chariots, and the king of Maachah and his people; who came and pitched before Medeba. And the children of Ammon gathered themselves together from their cities, and came to battle.