2 Chronicles 18:2-6

Some years later he went down to visit Ahab at Samaria, and Ahab slaughtered many sheep and oxen for him and the people who were with him. And he incited him to go up against Ramoth-gilead.

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?”