2 Chronicles 18:3, 5, 9

And Ahab king of Israel said unto Jehoshaphat king of Judah, Wilt thou go with me to Ramoth-gilead? And he answered him, I am as thou art, and my people as thy people; and we will be with thee in the war.

Then the king of Israel gathered the prophets together, four hundred men, and said unto them, Shall we go to Ramoth-gilead to battle, or shall I forbear? And they said, Go up; for God will deliver it into the hand of the king.

Now 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.