One problem with OT prophets was that they spoke of their dreams as divine revelation when they were not. Listen to this:
I have heard what the prophets who prophesy a lie in my name have said: I had a dream! I had a dream! How long will this continue . . . the prophets prophesying lies, prophets of deceit of their own minds? . . . The prophet who has only a dream should recount the dream, but the one who has My word should speak My word truthfully, for what is straw compared to grain? Jeremiah 23: 25ff.
Of course we have no prophets today—there is no need for further revelation (since the apostles received all additional revelation that God would give us [John 16: 13])—which is what true prophets brought to Israel. But there were also an abundance of false prophets as well. If a supposed prophet arises, claiming God is revealing truth through his dreams, be careful—you are listening to a false prophet. Of that you can be sure. Notice the standard by which to determine whether a message is from God or not is to determine whether it is straw or grain—a prophetic dream or God’s Word!
Which of the two would you trust? Read the rest of the passage in Jeremiah to learn more about this important matter of dreaming false prophets.