Sunan at-Tirmithiy كتاب الصلاة باب ما جاء فى كراهية النوم قبل العشاء والسمر بعدها
'Uthmān Ibn-'Affān said, "I heard the Prophet, peace and blessings of God be upon him, say, 'God builds a house in Paradise to whoever builds Him a mosque.'"(1) Footnotes: (1): The hadīth indicates that the reward is of the nature of the deed: it will be a house and it will be as revered as a mosque (but it will be like nothing seen before, as is everything in Paradise.) Click on ḥadīth to read more