It is narrated from Sayyiduna Sa’d ibn Abi Waqqas (may Allah be pleased with him) that he heard the Prophet (peace and blessings be upon him) say: “Except for Masjid al-Haram, offering one prayer in this mosque of mine is superior in reward to a thousand prayers offered in other mosques.”
Hadith Referenceمسند احمد / مسند باقي العشرة المبشرين بالجنة / 1605
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد حسن.