1 Kings 22:10-12

10Now the king of Israel and King Jehoshaphat of Judah were sitting each on his throne, arrayed in their robes, at a threshing-floor at the entrance of Samaria’s gate. All the prophets were prophesying before them.

11Now Zedekiah son of Chenaanah made himself horns of iron and said, “Thus says Adonai: ‘With these you will gore the Arameans until they are consumed!”

12Then all the prophets were prophesying so, saying, “Go up to Ramot-gilead and triumph! For Adonai will deliver it into the hand of the king!”