Sunan an-Nasa'i 689
سنن النسائي#689SahihIt was narrated from Anas that the Prophet (ﷺ) said:"One of the portents of the Hour will be that people will show off in building Masjids
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 ZaiIsnaad Sahih
In-book reference: 8:2