(3) باب فَضْلِ بِنَاءِ الْمَسَاجِدِ
Abdullah al-Khaulani reported that when Uthman b. 'Affan tried to rebuild the mosque of Allah's Messenger (ﷺ) the people began to talk about this. Uthman b. 'Affan said:
You discuss it very much whereas I have heard Allah's Messenger (ﷺ) as saying: He who builds a mosque-- and the narrator Bukair said: I think he also said: (for) seeking the pleasure of Allah- Allah would build (a similar house for him in Paradise). and in the narration of Harun (the words are):" A house for him in Paradise." (DE)
Reference (DE): Sahih Muslim 533 c (DE)
In-book reference (DE): Book 55, Hadith 53 (DE)
USC-MSA web (English) reference(deprecated numbering scheme): Book 42, Hadith 7109 (DE)