Musnad Ahmad 787
It was narrated that the freed slave of `Abdullah bin al-Harith said:
I did ‘Umrah with ‘Ali bin Abi Talib (رضي الله عنه) at the time of `Umar - or at the time of `Uthman. He stayed with his sister Umm Hani` 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 Shu`bah 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.
حَدَّثَنَا يَعْقُوبُ، حَدَّثَنَا أَبِي، عَنْ ابْنِ إِسْحَاقَ، حَدَّثَنِي أَبِي إِسْحَاقُ بْنُ يَسَارٍ، عَنْ مِقْسَمٍ أَبِي الْقَاسِمِ، مَوْلَى عَبْدِ اللَّهِ بْنِ الْحَارِثِ بْنِ نَوْفَلٍ عَنْ مَوْلَاهُ عَبْدِ اللَّهِ بْنِ الْحَارِثِ، قَالَ اعْتَمَرْتُ مَعَ عَلِيِّ بْنِ أَبِي طَالِبٍ رَضِيَ اللَّهُ عَنْهُ فِي زَمَانِ عُمَرَ أَوْ زَمَانِ عُثْمَانَ رَضِيَ اللَّهُ عَنْهُ فَنَزَلَ عَلَى أُخْتِهِ أُمِّ هَانِئٍ بِنْتِ أَبِي طَالِبٍ فَلَمَّا فَرَغَ مِنْ عُمْرَتِهِ رَجَعَ فَسُكِبَ لَهُ غُسْلٌ فَاغْتَسَلَ فَلَمَّا فَرَغَ مِنْ غُسْلِهِ دَخَلَ عَلَيْهِ نَفَرٌ مِنْ أَهْلِ الْعِرَاقِ فَقَالُوا يَا أَبَا حَسَنٍ جِئْنَاكَ نَسْأَلُكَ عَنْ أَمْرٍ نُحِبُّ أَنْ تُخْبِرَنَا عَنْهُ قَالَ أَظُنُّ الْمُغِيرَةَ بْنَ شُعْبَةَ يُحَدِّثُكُمْ أَنَّهُ كَانَ أَحْدَثَ النَّاسِ عَهْدًا بِرَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالُوا أَجَلْ عَنْ ذَلِكَ جِئْنَا نَسْأَلُكَ قَالَ أَحْدَثُ النَّاسِ عَهْدًا بِرَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قُثَمُ بْنُ الْعَبَّاسِ‏.‏