Musnad Ahmad 30:616

'Abd al-Razzaq narrated to us, Ibn Jurayj informed us, 'Ata' informed me, that Abu Salamah ibn 'Abd al-Rahman informed him, from Abu Hurayrah or from 'Aishah, that she said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "A prayer in my mosque is better than a thousand prayers in other than it from the mosques, except the Sacred Mosque (al-Masjid al-Haram)."