2 Chronicles 18:3-7

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.” But Jehoshaphat also said to the king of Israel, “First seek the counsel of the LORD.” 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.” But Jehoshaphat asked, “Is there no longer a prophet of the LORD here whom we can inquire of?” The king of Israel answered Jehoshaphat, “There is still one prophet through whom we can inquire of the LORD, but I hate him because he never prophesies anything good about me, but always bad. He is Micaiah son of Imlah.” “The king should not say such a thing,” Jehoshaphat replied.