It was narrated from Ibn 'Abbas that Maimunah the wife of the Prophet ﷺ said:

"Whoever prays in the Masjid of the Messenger of Allah ﷺ (that is good), for I heard the Messenger of Allah ﷺ say: ' One prayer offered there is better than a thousand prayers offered elsewhere, except the Masjid of the Ka'bah.'"

أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ نَافِعٍ، عَنْ إِبْرَاهِيمَ بْنِ عَبْدِ اللَّهِ بْنِ مَعْبَدِ بْنِ عَبَّاسٍ، أَنَّ مَيْمُونَةَ، زَوْجَ النَّبِيِّ ﷺ قَالَتْ مَنْ صَلَّى فِي مَسْجِدِ رَسُولِ اللَّهِ ﷺ فَإِنِّي سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ " الصَّلاَةُ فِيهِ أَفْضَلُ مِنْ أَلْفِ صَلاَةٍ فِيمَا سِوَاهُ إِلاَّ مَسْجِدَ الْكَعْبَةِ " .