1 Kings 22:10-12

10Now the king of Israel and Jehoshaphat the king of Judah were sitting on their thrones, arrayed in their robes, at the threshing floor at the entrance of the gate of Samaria, and all the prophets were prophesying before them.

11And Zedekiah the son of Chenaanah made for himself horns of iron and said, "Thus says the Lord, 'With these you shall push the Syrians until they are destroyed.'"

12And all the prophets prophesied so and said, "Go up to Ramoth-gilead and triumph; the Lord will give it into the hand of the king."