And the children of Ammon came out and put their army in array before the gate of the city : and the kings, that were come to their aid, stood apart in the field.

And 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.

and the sons of Ammon come out and set battle in array at the opening of the city, and the kings who have come are by themselves in the field.

So the children of Ammon came out and put their forces in position on the way into the town; and the kings who had come were stationed by themselves in the field.

And the sons of Ammon, going out, set up a battle line before the gate of the city. But the kings who had come to their aid stood separately in the field.

children of Ammon . . . put the battle in array before the gate of the city--that is, outside the walls of Medeba, a frontier town on the Arnon.
the kings that were come were by themselves in the field--The Israelitish army being thus beset by the Ammonites in front, and by the Syrian auxiliaries behind, Joab resolved to attack the latter (the more numerous and formidable host), while he directed his brother Abishai, with a suitable detachment, to attack the Ammonites. Joab's address before the engagement displays the faith and piety that became a commander of the Hebrew people. The mercenaries being defeated, the courage of the Ammonites failed; so that, taking flight, they entrenched themselves within the fortified walls.