Musnad Abu Ya'la al-Mawsili 160:130

Muhammad ibn al-Minhal narrated to us, Yazid ibn Zuray' narrated to us, Rawh ibn al-Qasim narrated to us, from al-'Ala' ibn 'Abd al-Rahman, from his father, from Abu Hurayrah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "A prayer in this mosque of mine is better than a thousand prayers in what is other than it, except for the Sacred House (al-Bayt al-Haram)."