Prophet Muhammad Peace Be Upon Him In Dream
The hadith is specific because it was the matter of recognising his person in the dream. Only those who recognized him could recognize him in the dream. Since satan could not take his shape so the companions were told not to believe in someone they see in their dream as prophet Muhammad if he doesn’t resemble him. However if they see him, they way they recognise him, then certainly it would be the prophet and the dream would be from God. Nowadays no one can be sure if he really see prophet Muhammad in his dream. It can be a subjective reality for the person if his dream comes true that it was from God.