Musannaf Ibn Abi Shayba 23:146

Abu Bakr ibn Ayyash narrated to us, from Asim, from Abu Salih, from Abu al-Darda, who said: I asked the Prophet, may Allah bless him and grant him peace, about: "For them are good tidings in the worldly life." He said: "The good dream that a Muslim sees or is seen for him."