2 Chronicles 18:9-12

9Now the king of Israel and Jehoshaphat the king of Judah sat each on his throne, arrayed in their robes, and they were sitting in an open place at the entrance of the gate of Samaria; and all the prophets were prophesying before them. 10And Zedekiah the son of Chenaanah made him horns of iron and said, Thus saith Jehovah, With these shalt thou push the Syrians, until they be consumed. 11And all the prophets prophesied so, saying, Go up to Ramoth-gilead, and prosper; for Jehovah will deliver it into the hand of the king.

12And the messenger that went to call Micaiah spake to him, saying, Behold, the words of the prophets declare good to the king with one mouth: let thy word therefore, I pray thee, be like one of theirs, and speak thou good.