The mosques of Allah shall be maintained only by those who believe in Allah and the Last Day; perform As-Salat (Iqamat-as-Salat) and give Zakat and fear none but Allah. It is they who are expected to be on true guidance (09:18)
Whoever builds a mosque for the sake of Allah, like a sparrow’s nest for Allah or even smaller, Allah will build for him a house in paradise (Hadith)