What did the Prophet Muhammad (saw) command Hassan bin Thabit Al-Ansari to do when Abu Huraira was present?
 Narrated Abu Salama bin `Abdur-Rahman bin `Auf:                     that he heard Hassan bin Thabit Al-Ansari asking the witness of Abu Huraira, saying, "O Abu- Huraira! I beseech you by Allah (to tell me). Did you hear Allah's Apostle saying' 'O Hassan ! Reply on behalf of Allah's Apostle. O Allah ! Support him (Hassan) with the Holy Spirit (Gabriel).'?" Abu Huraira said, "Yes."