مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1604
Musnad Abu Ishaq Sa'd bin Abi Waqqas
It was narrated from Sa’d bin Abi Waqqas that he heard the Messenger of Allah (ﷺ) say: One prayer in this mosque of mine is better than a thousand prayers elsewhere, except al-Masjid al-Haram."
Musnad Ahmad 1605Sahih because of corroborating evidence; this is a Hasan isn