Narrated 'Abdullah bin Zaid bin Abd-Rabbihi (RA): A man appeared to me while I was asleep and told me to say, "Allahu Akbar, Allahu Akbar (Allah is the Most Great, Allah is the Most Great)" and he mentioned the Adhan with Allahu Akbar four times without Tarji', and the Iqama once except Qad qamat-is-Salah (the prayer stood ready to begin), (he repeated it twice). He ('Abdullah) said when it was morning I went to Allah's Messenger ( صلی اللہ علیہ وسلم ) and he said, "It is a true vision..." [Reported by Ahmad and Abu Dawud; at-Tirmidni and Ibn Khuzaimah graded it Sahih (authentic)] . Ahmad added to the end of the above Hadith, the story of BIlal's statement in the Fajr Adhan (morning prayer call): as-Salatu khairun minan-nawm - "Prayer is better than sleep".