Musannaf Ibn Abi Shayba 3:5137

Abu Usama narrated to us, he said: Abdullah bin Umar narrated to us, from Nafi’, from Ibn Umar, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "A prayer in this mosque of mine is better than a thousand prayers in any other, except for the Sacred Mosque (al-Masjid al-Haram)."