2 Kings 3:6

But it came to pass, when Ahab was dead, that the king of Moab rebelled against the king of Israel.

And he went and sent to Jehoshaphat the king of Judah, saying, The king of Moab hath rebelled against me: wilt thou go with me against Moab to battle? And he said, I will go up: I am as thou art, my people as thy people, and my horses as thy horses.