Sunan an-Nasa'i 688
سنن النسائي#688Sahihأَخْبَرَنَا عَمْرُو بْنُ عُثْمَانَ، قَالَ حَدَّثَنَا بَقِيَّةُ، عَنْ بَحِيرٍ، عَنْ خَالِدِ بْنِ مَعْدَانَ، عَنْ كَثِيرِ بْنِ مُرَّةَ، عَنْ عَمْرِو بْنِ عَبَسَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " مَنْ بَنَى مَسْجِدًا يُذْكَرُ اللَّهُ فِيهِ بَنَى اللَّهُ عَزَّ وَجَلَّ لَهُ بَيْتًا فِي الْجَنَّةِ " .
It was narrated from 'Amr bin 'Abasah that the Messenger of Allah (ﷺ) said:"Whoever builds a Masjid in which Allah is remembered, Allah, (the Mighty and Sublime) will build for him a house in Paradise
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 8:1