2 Kings 3:5-8

5but when Ahab died, the king of Moab rebelled against the king of Israel.

6So King Joram marched out from Samaria at that time and mobilized all Israel.

7Then he sent a message to King Jehoshaphat of Judah: “The king of Moab has rebelled against me. Will you go with me to fight against Moab?” Jehoshaphat said, “I will go. I am as you are, my people as your people, my horses as your horses.”

8He asked, “Which route should we take?” He replied, “The route of the Wilderness of Edom.”