Mukhtasar Sahih Bukhari — Hadith 621

Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Offering one prayer in my mosque is better than offering a thousand prayers in other mosques, except for Masjid al-Haram (for the reward of praying there is greater)."