Musannaf Ibn Abi Shayba 23:201

Abu Mu'awiyah and Waki' narrated to us, from al-A'mash, from Dhubyan, from 'Alqama, who said: 'Abdullah said: "Dreams are three: the presence of Satan, a man speaking to himself during the day and seeing it at night, and the dream which is the [true] dream."