1 Kings 22:5-7

22:5 Then Jehoshaphat added, “First seek an oracle from the Lord.” 22:6 So the king of Israel assembled about four hundred prophets and asked them, “Should I attack Ramoth Gilead or not?” They said, “Attack! The sovereign one will hand it over to the king.” 22:7 But Jehoshaphat asked, “Is there not a prophet of the Lord still here, that we may ask him?”