[Machine] Nafi' is beneficial, and even if he is healthy, be cautious of him. I saw in the book of Al-'Ilal by Abu 'Isa At-Tirmidhi, from Abu 'Isa who said, I asked about him (meaning Muhammad, i.e. Al-Bukhari, may Allah have mercy on him). He said, "Indeed, Nafi' contradicts Salim in some narrations, and this is from those narrations, as if he considered both narrations to be authentic and that it is possible that they are both from them." He said, "And this hadith has been narrated from 'Ubaydullah bin Abi Ja'far and others." The sheikh said, "As for the narration from him (i.e. 'Ubaydullah bin Abi Ja'far), it is from him (i.e. 'Ubaydullah) from Bukayr bin Al-Ashajj from Nafi' from Ibn 'Umar from the Prophet ﷺ, contrary to this wording."  

نَافِعٌ وَإِنْ كَانَ سَالِمٌ أَحْفَظَ مِنْهُ وَرَأَيْتُ فِي كِتَابِ الْعِلَلِ لِأَبِي عِيسَى التِّرْمِذِيِّ عَنْ أَبِي عِيسَى قَالَ سَأَلْتُ عَنْهُ مُحَمَّدًا يَعْنِي الْبُخَارِيَّ رَحِمَهُ اللهُ فَقَالَ إِنَّ نَافِعًا يُخَالِفُ سَالِمًا فِي أَحَادِيثَ وَهَذَا مِنْ تِلْكَ الْأَحَادِيثِ وَكَأَنَّهُ رَأَى الْحَدِيثَيْنِ صَحِيحَيْنِ وَأَنَّهُ يُحْتَمَلُ عَنْهُمَا جَمِيعًا قَالَ وَقَدْ رُوِيَ هَذَا الْحَدِيثُ عَنْ عُبَيْدِ اللهِ بْنِ أَبِي جَعْفَرٍ وَغَيْرِهِ قَالَ الشَّيْخُ أَمَّا الرِّوَايَةُ فِيهِ عَنْ عُبَيْدِ اللهِ بْنِ أَبِي جَعْفَرٍ فَإِنَّهَا عَنْهُ عَنْ بُكَيْرِ بْنِ الْأَشَجِّ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ عَنِ النَّبِيِّ ﷺ بِخِلَافِ هَذَا اللَّفْظِ