Sayyiduna Abu Hurayrah (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "Praying in my mosque is better than a thousand prayers offered elsewhere, except al-Masjid al-Haram."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10276