question #1 Sahih al-Bukhari 450, Book 8, Hadith 99 : What is the significance of building a mosque in Islam?

I heard `Uthman bin `Affan saying, when people argued too much about his intention to reconstruct
the mosque of Allah’s Messenger (ﷺ), “You have talked too much. I heard the Prophet (ﷺ) saying, ‘Whoever built
a mosque, (Bukair thought that `Asim, another sub-narrator, added, “Intending Allah’s Pleasure”),
Allah would build for him a similar place in Paradise.’ ”