The Book of the Masjids
8/7. Chapter:
The Virtue Of The Prophet's Masjid And Praying Therein
Sunan an-Nasai
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنْ عَمَّارٍ الدُّهْنِيِّ، عَنْ أَبِي سَلَمَةَ، عَنْ أُمِّ سَلَمَةَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " إِنَّ قَوَائِمَ مِنْبَرِي هَذَا رَوَاتِبُ فِي الْجَنَّةِ " .
It was narrated from Umm Salamah that the Prophet (ﷺ) said: "The columns of this Minbar of mine will be in Paradise."
Reference : Sunan an-Nasa'i 696In-book reference : Book 8, Hadith 9English translation : Vol. 1, Book 8, Hadith 697