Sunan an-Nasa'i, Volume 1, Book 8, Hadith 689 (DarusSalam) ⓘ
It was narrated from 'Amr bin 'Abasah that the Messenger of Allah said: "Whoever builds a Masjid in which Allah is remembered, Allah, (the Mighty and Sublime) will build for him a house in Paradise."
أَخْبَرَنَا 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 " .
also referenced under: Hadith 688 (Reference) & Book 8, Hadith 1 (In-Book)