I did ‘Umrah with ‘Ali bin Abi Talib ؓ at the time of ʿUmar - or at the time of ʿUthman. He stayed with his sister Umm Haniʿ bint Abi Talib, and when he had finished his ‘Umrah he went back, and water was prepared for him and he washed himself. When he had finished washing himself, some of the people of Iraq entered upon him and said: O, Abu Hasan, we have come to you to ask you about something we would like you to tell us about, He said: I think Al-Mugheerah bin Shuʿbah is telling you that he was the last of the people to speak to the Messenger of Allah ﷺ. They said: Yes, we have come to ask you about that. He said: The last of the people to speak to the Messenger of Allah ﷺ was Qutham bin al-Abbas.  

أَنَّهُ كَانَ أَحْدَثَ النَّاسِ عَهْدًا بِرَسُولِ اللهِ ﷺ؟ قَالُوا أَجَلْ عَنْ ذَلِكَ جِئْنَا نَسْأَلُكَ قَالَ أَحْدَثُ النَّاسِ عَهْدًا بِرَسُولِ اللهِ صَلَّى اللهُ ﷺ قُثَمُ بْنُ الْعَبَّاسِ