Forbiddance of leaving the mosque after the Adhan

 249. Abu Sha´tha´ said: While we were sitting with Abu Hurairah in the mosque, the Mu´adhdhin called Adhan. A man stood up and walked out of the mosque. Abu Hurairah was looking at him until the man stepped out of the mosque. Abu Hurairah remarked upon this: ´´This (man) disobeyed Abul-Qasim.´´