we (men) have heard this line before at least once in our lifetime. Hadhrat Abu Qursaafah (Radhiallaahu Anhu) narrates that Rasulullah (Sallallaahu Alayhi Wasallam) said, 'Removing dust particles and waste from the Masjid is the Mahr (dowry) of large eyed Hoors of Jannah.' (Tabrani; extracted from Hayaatul Muslimeen) http://www.askimam.org/fatwa/fatwa.p...e1c8e041e078d2