Ibn al-Farra' said: Ya'qub ibn Shaybah mentioned in the first part of the Musnad of 'Ammar: I heard Ahmad ibn Hanbal being asked about the hadith of the Prophet, peace and blessings of Allah be upon him, regarding 'Ammar: "The rebellious group will kill you." Ahmad said: "It is as the Messenger of Allah, peace and blessings of Allah be upon him, said: the rebellious group killed him." He also said: "There is more than one authentic hadith on this subject from the Prophet, peace and blessings of Allah be upon him," and he disliked speaking on this matter with anything more than this. This book is narrated by Abu al-Qasim 'Abd al-'Aziz al-Azaji from Ibn Hammah al-Khallal, from Abu Bakr Muhammad ibn Ahmad ibn Ya'qub ibn Shaybah, from his grandfather Ya'qub.