2 Kings 3:8

“And he said, which way shall we go up etc.] 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, (<042001>Numbers 20:1,16) 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,…”

“Which way shall we go up? And he answered, The way through the wilderness of Edom--This was a long and circuitous route, by the southern bend of the Dead Sea. Jehoshaphat however preferred it, partly because the part of the Moabite territory at which they would arrive, was the most defenseless; and partly because he would thereby enlist, in the expedition, the forces of the king of Edom. But, in penetrating the deep, rocky valley of Ahsy, which forms the boundary between Edom and Moab, the confederate army was reduced, both man and beast, to the greatest extremities for want of water. They were disappointed by finding the wady of this valley, the brook Zered (Deu 2:13-18) [ROBINSON], dry.…”

“The readiest and most natural “way” was across the Jordan near Jericho into the Arboth-Moab, and then along the eastern shore of the Dead Sea to Moab proper, the tract south of the Arnon. But the way chosen was that which led to the Edomite country, namely, round the southern extremity of the Dead Sea, and across the Arabah, or continuation of the Jordan and Dead Sea valley. Thus would be effected a junction with the forces of Edom, which had resumed its dependence on Judah, though the year before it had been in alliance with Moab 2 Chronicles 20:22; and they would come upon the Moabites unprepared. return to 'Top of Page'”

“3:8-9 The king of Edom . . . joined them: Edom was apparently a vassal kingdom to Judah at this time. Later, in the days of Jehoshaphat’s son Jehoram, Edom successfully rebelled against Judah (8:20-22). The southern route through Edom avoided strong Moabite fortifications, but it was dangerous because water was scarce.”

“the wilderness of Edom: The wilderness of Edom was probably the same as that of Zin or Kadesh, through which the children of Israel passed; extending southward from the Dead Sea, to the eastern branch of the Red Sea. See note on Num 13:21. Num 21:4; Mal 1:2, Mal 1:3 4 Kings (2 Kings) 3:9”