That being unable to defend the city longer, he might make an escape; which he chose to do on the king of Edom's quarter, because he thought either that his was the weakest side, or that he would more willingly suffer him to escape, because he was not so hearty in the war as the rest, but only forced to it, and he might hereafter have some occasion of the king of Moab to join with him, as before he had, 2 Chronicles 20:22.
Related Commentaries of 2 Kings 3:26
2 Kings 3:26
26 And when the king of Moab saw that the battle was too sore for him, he took with him seven hundred men that drew swords, to break through even unto the king of Edom: but they could not.