Sahih Muslim 7471
صحيح مسلم#7471SahihMahmud b. Labid reported that 'Uthman b. 'Affan decided to rebuild the mosque (of Allah's Apostle in Medina) but the people did not like this idea and they wished that it should be preserved in the same (old) form. Thereupon he (Hadrat 'Uthman) said:I heard Allah's Messenger (ﷺ) as saying: He who builds a mosque for Allah, Allah would build for him (a house) in Paradise like it
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 55:54