Whoever built a masjid, with the intention of seeking Allaah’s pleasure ..

309. Narrated ‘Ubaidullaah Al-Khaulaani (radhi Allaahu anhu) :

I heard ‘Uthmaan bin ‘Affaan (radhi Allaahu anhu) saying, when people argued too much about his intention to reconstruct the masjid of Allaah’s Messenger (Sallallaahu Alaihi Wasallam), “You have talked too much. I heard the Prophet (Sallallaahu Alaihi Wasallam) saying,

‘Whoever built a masjid, with the intention of seeking Allaah’s pleasure, Allaah will build for him a similar place in Paradise.”

[Saheeh Al-Bukhaari, Hadeeth No. 441, Vol.1]

Source : The Book of Mosques and places of worship – Chapter 4 – The superiority of building mosques and exhortation to it. Al-Lulu Wal-Marjan, Compiled by : Fuwad Abdul-Baqi, Translated by : Dr. Muhammad Muhsin Khan