2 Kings 3:8

Overview - 2 Kings 3
Jehoram's reign.
Mesha rebels.
Jehoram, with Jehoshaphat, and the king of Edom, being distressed for want of water, by Elisha obtains water, and promise of victory.
21 The Moabites, deceived by the colour of the water, coming to spoil, are overcome.
26 The king of Moab, failing in his attempt to break through to the king of Edom, sacrifices his son, and raises the siege.
Treasury of Scripture Knowledge

2 Kings 3:8  (King James Version)
And he said, Which way shall we go up? And he answered, The way through the wilderness of Edom.

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 Numbers 13:21 .
Numbers 21:4 ; Malachi 1:2 Malachi 1:3