Sunan an-Nasa'i 688
سنن النسائي#688SahihIt 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
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 8:1