Musannaf Ibn Abi Shayba 23:187

Abu Mu'awiyah narrated to us, from al-A'mash, from Yazid al-Raqashi, from Anas, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "The dream has nicknames and it has names, so nickname it by its nicknames and interpret it by its names. And the dream is for the first interpreter."