Sahih Bukhari

Narrated 'Ubaidullah Al-Khaulani: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