The merits of bulding a mosque for the sake of Allah
240. Mahmud bin Labid narrated that ´Uthman bin ´Aggan intended to build the mosque (Prophet´s mosque), but people disliked the idea and preferred to keep it as is. He (´Uthman) said: ´´I heard the Messenger of Allah salla alayhi wa sallam saying: ´Whoever builds a mosque for the sake of Allah, Allah will build for him in Jannah one like that.´´´