Narrated Ibn Kab bin Malik: On the authority of his father: Umm Mubashshir said to the Prophet ﷺ during the sickness of which he died: What do you think about your illness, Messenger of Allah ﷺ? I do not think about the illness of my son except the poisoned sheep of which he had eaten with you at Khaybar. The Prophet ﷺ said: And I do not think about my illness except that. This is the time when it cut off my aorta. Abu Dawud said: Sometime Abd al-Razzaq transmitted this tradition, omitting the link of the Companion, from Mamar, from al-Zuhri, from the Prophet ﷺ, and sometimes he transmitted it from al-Zuhri from Abdur-Rahman bin Kab bin Malik, Abdur-Rahman mentioned that Mamar sometimes transmitted the tradition in a mursal form (omitting the link of the Companion), and they recorded it. And all this is correct with us. Abd al-Razzaq said: When Ibn al-Mubarak came to Mamar, he transmitted the traditions in a musnad form (with a perfect chain) which he transmitted as mauquf traditions (statements of the Companions and not of the Prophet).