2 Chronicles 18:3, 5, 9

Ahab king of Israel said to Jehoshaphat king of Judah, “Will you go with me to Ramoth-gilead?” He answered him, “I am as you are, my people as your people. We will be with you in the war.”

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

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