1 Kings 22:10-12

10Now the king of Israel and Jehoshaphat king of Judah were each sitting on his throne, dressed in their [royal] robes, [in an open place] at the threshing floor at the entrance of the gate of Samaria; and all the prophets were prophesying before them.

11Then Zedekiah the son of Chenaanah made for himself horns of iron and said, “Thus says the Lord: ‘With these you will gore the Arameans (Syrians) until they are destroyed.’ ”

12All the prophets were prophesying in the same way [to please Ahab], saying, “Go up to Ramoth-gilead and be successful, for the Lord will hand it over to the king.”