Sahih al-Bukhari 4428

Arabic

وَقَالَ يُونُسُ عَنِ الزُّهْرِيِّ، قَالَ عُرْوَةُ قَالَتْ عَائِشَةُ ـ رضى الله عنها ـ كَانَ النَّبِيُّ صلى الله عليه وسلم يَقُولُ فِي مَرَضِهِ الَّذِي مَاتَ فِيهِ ‏ "‏ يَا عَائِشَةُ مَا أَزَالُ أَجِدُ أَلَمَ الطَّعَامِ الَّذِي أَكَلْتُ بِخَيْبَرَ، فَهَذَا أَوَانُ وَجَدْتُ انْقِطَاعَ أَبْهَرِي مِنْ ذَلِكَ السَّمِّ ‏"‏‏.‏

English translation

Narrated `Aisha: The Prophet (ﷺ) in his ailment in which he died, used to say, "O `Aisha! I still feel the pain caused by the food I ate at Khaibar, and at this time, I feel as if my aorta is being cut from that poison

Reference: Sahih al-Bukhari 4428, Book of Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi). English translation by Dr. Muhammad Muhsin Khan.