Benefits of sitting in the Masjid and removing rubbish from It
Deeds and virtues of the Masjid 236
275. Abu Sa'id RadiyAllaahu 'anhu narrates that RasuulUllaah (SallAllaahu 'alaihi wa 'aalihii wasallam) said: If you see a man frequenting the Masjid, bear witness to his Iimaan. Aallaah SubhaanaHuu wa Ta'aalaa says: 'Innamaa ya'-muru MasaajidAllaahi man 'aamana BIllaahi wal- Yawmil- 'Aakhiri. (Only he will frequent the Masjids, who believes in Allaah and the Last Day).
276. Abu Hurairah RadiyAllaahu 'anhu narrates that Nabii (SallAllaahu 'alaihi wa 'aalihii wasallam) said: A Muslim that makes the Masjid his abode for Salaat and Dhikr, Allaah is overjoyed with him, as a family is overjoyed by the return of an absent relative. (Ibne-Maajah)
Note: Making his abode means that he develops a special attachment to the Masjid, and remains there for a major part of his time.