And Qutaybah ibn Sa'id and Muhammad ibn Rumh ibn al-Muhajir narrated to us. Ibn Rumh said: al-Layth informed us, from 'Uqayl, from Ibn Shihab: Sa'id ibn al-Musayyab informed me that Abu Hurayrah informed him that the Messenger of Allah, peace and blessings be upon him, said: "If you say to your companion, 'Be quiet,' on Friday while the imam is delivering the sermon, you have spoken vainly."