2 Kings 3:8
And he said, Which way shall we go up? And he answered, The way through the wilderness of Edom.
And he said, Which way shall we go up.... That is, Jehoram said so to Jehoshaphat, consulting with him which was the best way to take to the land of Moab, whether the shortest way, over Jordan; or some other:
And he answered, The way through the wilderness of Edom; which bordered upon it, and the same through which the Israelites passed; for Kadesh was on the extreme border of Edom, whither they came, Numbers 20:1 and this Jehoshaphat proposed, partly that they might come upon Moab unawares, and attack them where they were weakest, and not on their guard; and partly, to take the king of Edom with them, who was no other than Jehoshaphat's deputy, and so be assisting to them, and prevent him from revolting, which otherwise he might take this opportunity of doing.