'Prophesying' in the Bible

Now the king of Israel and King Jehoshaphat of Judah were sitting on their respective thrones, dressed in their royal robes, at the threshing floor at the entrance of the gate of Samaria. All the prophets were prophesying before them.

All the prophets were prophesying the same, saying, "Attack Ramoth Gilead! You will succeed; the Lord will hand it over to the king!"

While he was speaking, Amaziah said to him, "Did we appoint you to be a royal counselor? Stop prophesying or else you will be killed!" So the prophet stopped, but added, "I know that the Lord has decided to destroy you, because you have done this thing and refused to listen to my advice."