وَحَدَّثَنِي مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ قُهْزَاذَ، - مِنْ أَهْلِ مَرْوَ - قَالَ أَخْبَرَنِي عَلِيُّ بْنُ حُسَيْنِ بْنِ وَاقِدٍ، قَالَ قَالَ عَبْدُ اللَّهِ بْنُ الْمُبَارَكِ قُلْتُ لِسُفْيَانَ الثَّوْرِيِّ إِنَّ عَبَّادَ بْنَ كَثِيرٍ مَنْ تَعْرِفُ حَالَهُ ‏.‏ وَإِذَا حَدَّثَ جَاءَ، بِأَمْرٍ عَظِيمٍ فَتَرَى أَنْ أَقُولَ، لِلنَّاسِ لاَ تَأْخُذُوا عَنْهُ قَالَ سُفْيَانُ بَلَى ‏.‏ قَالَ عَبْدُ اللَّهِ فَكُنْتُ إِذَا كُنْتُ فِي مَجْلِسٍ ذُكِرَ فِيهِ عَبَّادٌ أَثْنَيْتُ عَلَيْهِ فِي دِينِهِ وَأَقُولُ لاَ تَأْخُذُوا عَنْهُ ‏.‏ وَقَالَ مُحَمَّدٌ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ عُثْمَانَ، قَالَ قَالَ أَبِي قَالَ عَبْدُ اللَّهِ بْنُ الْمُبَارَكِ انْتَهَيْتُ إِلَى شُعْبَةَ فَقَالَ هَذَا عَبَّادُ بْنُ كَثِيرٍ فَاحْذَرُوهُ ‏.‏

‘Indeed Abbād bin Kathīr, about whose condition you are aware, when he related [narrations] he introduced a grave matter- do you believe that it should be said to the people ‘Do not take from him?’ Sufyān said: ‘Indeed!’ Abd Allah [bin al-Mubārak] said: ‘So when I was in an assembly and Abbād was mentioned there, I praised him regarding his Dīn and said: ‘Do not take from him.’ Muhammad said, Abd Allah bin Uthmān narrated to us, he said, my father said, Abd Allah bin al-Mubārak said: ‘I ended up in an assembly of Shu’bah, and he said: ‘This is Abbād bin Kathīr so be warned against him.’