2 Chronicles 18:3-7

Ahab king of Israel said to Jehoshaphat king of Judah, “Will you go with me against Ramoth-gilead?” And he said to him, “I am as you are, and my people as your people, and we will be with you in the battle.”

However, Jehoshaphat said to the king of Israel, “Please request the word of the Lord first.”

So the king of Israel assembled the prophets, four hundred men, and said to them, “Should we go to battle against Ramoth-gilead, or should I refrain?” And they said, “Go up, for God will hand it over to the king.”

But Jehoshaphat said, “Is there no longer a prophet of the Lord here, that we may inquire of him?”

And 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 regarding me, but always bad. He is Micaiah the son of Imlah.” But Jehoshaphat said, “May the king not say so.” Ahab’s False Prophets Assure Victory