2 Kings 3:6-7

So King Jehoram marched out of Samaria at that time and mustered all Israel. And he went and sent word to Jehoshaphat king of Judah: “The king of Moab has rebelled against me. Will you go with me to battle against Moab?” And he said, “I will go. I am as you are, my people as your people, my horses as your horses.”