The Messenger of Allah ﷺ used to say during the illness from which he died, "Ayesha, I still feel the pain of the food I ate at Khaybar. This is the moment when my aorta is being severed by that poison."
كان رسول الله ﷺ يقول في مرضه الذي توفي فيه: يا عائشة! إني أجد ألم الطعام الذي أكلته بخيبر، فهذا أوان انقطاع أبهري من ذلك السم.
Hakim narrated it (3/58) from Abu Bakr Ahmad bin Muhammad bin Yahya Ashqar, who said, Yusuf bin Musa Marwazi told us, Ahmad bin Salih told us, Anbasah told us, Yunus told us, from Ibn Shihab, who said, Urwa said, Ayesha used to say, and he related it.Bukhari mentioned it as a suspended narration (4428), saying, Yunus said, from Zuhri, and he mentioned something similar to it.Anbasah is Ibn Khalid bin Yazid Umawi, who was trustworthy, as stated in Taqrib. Bazzar faulted it on the grounds that Anbasah alone reported it from Yunus as a connected chain, because Musa bin Uqba narrated it in al-Maghazi from Zuhri as a mursal narration, as noted in Fath al-Bari (8/13). The abhar is the vessel connected to the heart, and there are two of them.Also on this subject is what was narrated from Jabir bin Abdullah, narrated by Abu Dawud (4510), except that it contains a break between Ibn Shihab and Jabir bin Abdullah. It states, The Jewish woman said, "Who told you?" He said, "This one in my hand told me," referring to the forearm. It also mentions, The Messenger of Allah ﷺ had himself cupped on his shoulder because of what he had eaten from the sheep. Abu Hind cupped him with the horn and the blade, and he was a freedman of Banu Bayada from the Ansar.Likewise, what was narrated from Umm Mubashir is not sahih. She said to the Prophet ﷺ during the illness in which he died, "What do you suspect to be the cause, O Messenger of Allah? For I suspect nothing regarding my son except the poisoned sheep that he ate with you at Khaybar." The Prophet ﷺ said, "And I suspect nothing for myself except that, for this is the time when my abhar was cut."Abu Dawud narrated it (4513) from Makhlad bin Khalid, who said, Abdul-Razzaq told us, Muammar told us, from Zuhri, from Kaab bin Malik, from his father, from Umm Mubashir, who said...Abu Dawud said, "Abdul-Razzaq would sometimes narrate this hadith as mursal, from Muammar, from Zuhri, from the Prophet ﷺ, and he would sometimes narrate it from Zuhri, from Abdul-Rahman bin Kaab bin Malik. Abdul-Razzaq mentioned that Muammar would sometimes narrate the hadith to them as mursal, so they would write it down, and at other times he would narrate it to them with a connected chain, so they would write it down, and all of it is sahih in our view. Abdul-Razzaq said, When Ibn Mubarak came to Muammar, Muammar gave him connected chains for hadiths he had been leaving unconnected." That is the end of Abu Dawud's statement.He then narrated it (4514) from Ahmad bin Hanbal, and it is found in his Musnad (23933), from Ibrahim bin Khalid, who said, Rabah told us, from Muammar, from Zuhri, from Abdul-Rahman bin Abdullah bin Kaab bin Malik, from his mother Umm Mubashir.Abu Saeed Arabi said, "That is what he said, 'from his mother,' but the correct version is 'from his father, from Umm Mubashir.'" He then related the meaning of the hadith of Makhlad bin Khalid, similar to the hadith of Jabir, and it states, The Messenger of Allah ﷺ gave orders concerning her, and she was killed, but he did not mention the cupping.