2 Kings 3:1-7

Jehoram the son of Ahab became king over Israel in Samaria in the eighteenth year of Jehoshaphat king of Judah, and reigned twelve years. He did evil in the sight of the LORD, but not like his father and mother; for he put away the sacred pillar of Baal that his father had made. Nevertheless, he continued in the [idolatrous] sins of Jeroboam the son of Nebat, who made Israel sin; he did not depart from them. Mesha the king of Moab was a sheep breeder, and he used to pay [an annual tribute] to the king of Israel 100,000 lambs and the wool of 100,000 rams. But when Ahab died, the king of Moab rebelled against the king of Israel. So King Jehoram left Samaria at that time and assembled all [the fighting men of] Israel. Then he went and sent word to Jehoshaphat king of Judah, saying, “The king of Moab has rebelled against me. Will you go with me to fight against Moab?” And he replied, “I will go; I am as you are, my people as your people, my horses as your horses.”