1 Kings 22:4

And he said unto Jehoshaphat, whom he intended to gain for his side, Wilt thou go with me to battle to Ramoth-gilead? And Jehoshaphat, who should have kept out of this entangling alliance, said to the king of Israel, I am as thou art, my people as thy people, my horses as thy horses, he pledged himself and all his resources, his entire military power, to the support of Ahab's project.