Uthman bin Affan narrated that :
he heard Allah's Messenger (ﷺ) say: "Whoever builds a Masjid for (the sake of) Allah, then Allah will build a similar house for him in Paradise."
وَقَدْ رُوِيَ عَنِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُ قَالَ " مَنْ بَنَى لِلَّهِ مَسْجِدًا صَغِيرًا كَانَ أَوْ كَبِيرًا بَنَى اللَّهُ لَهُ بَيْتًا فِي الْجَنَّةِ " . حَدَّثَنَا بِذَلِكَ قُتَيْبَةُ حَدَّثَنَا نُوحُ بْنُ قَيْسٍ عَنْ عَبْدِ الرَّحْمَنِ مَوْلَى قَيْسٍ عَنْ زِيَادٍ النُّمَيْرِيِّ عَنْ أَنَسٍ عَنِ النَّبِيِّ صلى الله عليه وسلم بِهَذَا .
It has been related that :
the Prophet (ﷺ) said: "Whoever builds a Masjid for (the sake of) Allah, be it small or large, then Allah will build a house for him in Paradise."