2 Chronicles 18:3, 5, 9

Ahab king of Israel asked Jehoshaphat king of Judah, “Will you go with me against Ramoth Gilead?” Jehoshaphat replied, “I am as you are, and my people as your people; we will join you in the war.”

So the king of Israel brought together the prophets—four hundred men—and asked them, “Shall we go to war against Ramoth Gilead, or shall I not?” “Go,” they answered, “for God will give it into the king’s hand.”

Dressed in their royal robes, the king of Israel and Jehoshaphat king of Judah were sitting on their thrones at the threshing floor by the entrance of the gate of Samaria, with all the prophets prophesying before them.