2 Chronicles 18:1-8

Now Jehoshaphat had great wealth and honor, and was allied by marriage with Ahab. Some years later he went down to [visit] Ahab in Samaria. And Ahab slaughtered many sheep and oxen for him and the people who were with him, and induced him to go up against Ramoth-gilead. Ahab king of Israel said to Jehoshaphat king of Judah, “Will you go with me to [fight against] Ramoth-gilead?” He answered, “I am as you are, and my people as your people [your hopes and concerns are ours]; we will be with you in the battle.” Further, Jehoshaphat said to the king of Israel, “Please inquire first for the word of the LORD.” Then the king of Israel assembled the prophets, four hundred men, and said to them, “Shall we go against Ramoth-gilead to battle, or shall I refrain?” And they said, “Go up, for God will hand it over to the king.” But Jehoshaphat said, “Is there no prophet of the LORD still here by whom we may inquire?” The king of Israel said to Jehoshaphat, “There is still one man by whom we may inquire of the LORD, but I hate him, for he never prophesies [anything] good for me, but always evil. He is Micaiah the son of Imla” And Jehoshaphat said, “Let not the king say so [perhaps this time it will be different].” Then the king of Israel called for an officer and said, “Bring Micaiah the son of Imla quickly.”