Musnad Ahmad 8:166

Sulayman ibn Dawud narrated to us, Abd al-Rahman—meaning Ibn Abi al-Zinad—informed us, from Musa ibn Uqbah, from Abu Abd Allah al-Qaraz, from Sa'd ibn Abi Waqqas, that he heard the Messenger of Allah, may Allah bless him and grant him peace, say: "A prayer in this mosque of mine is better than a thousand prayers in what is other than it, except for the Sacred Mosque (al-Masjid al-Haram)."