1 Kings 22:29

And it came to pass in the third year, that Jehoshaphat the king of Judah came down to the king of Israel. And the king of Israel said unto his servants, Know ye that Ramoth in Gilead is ours, and we be still, and take it not out of the hand of the king of Syria? And he said unto Jehoshaphat, Wilt thou go with me to battle to Ramothgilead? And Jehoshaphat said to the king of Israel, I am as thou art, my people as thy people, my horses as thy horses. And Jehoshaphat said unto the king of Israel, Enquire, I pray thee, at the word of the LORD to day. Then the king of Israel gathered the prophets together, about four hundred men, and said unto them, Shall I go against Ramothgilead to battle, or shall I forbear? And they said, Go up; for the LORD shall deliver it into the hand of the king. And Jehoshaphat said, Is there not here a prophet of the LORD besides, that we might enquire of him? And the king of Israel said unto Jehoshaphat, There is yet one man, Micaiah the son of Imlah, by whom we may enquire of the LORD: but I hate him; for he doth not prophesy good concerning me, but evil. And Jehoshaphat said, Let not the king say so. Then the king of Israel called an officer, and said, Hasten hither Micaiah the son of Imlah.

So the king of Israel and Jehoshaphat the king of Judah went up to Ramothgilead.