2 Chronicles 18:3-5

3Ahab 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.”

4But Jehoshaphat also said to the king of Israel, “First seek the counsel of the LORD .”

5So 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.”