وَحَدَّثَنِي عَبْدُ الرَّحْمَنِ بْنُ بِشْرٍ الْعَبْدِيُّ، قَالَ سَمِعْتُ يَحْيَى بْنَ سَعِيدٍ الْقَطَّانَ، ذُكِرَ عِنْدَهُ مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ عُبَيْدِ بْنِ عُمَيْرٍ اللَّيْثِيُّ فَضَعَّفَهُ جِدًّا ‏.‏ فَقِيلَ لِيَحْيَى أَضْعَفُ مِنْ يَعْقُوبَ بْنِ عَطَاءٍ قَالَ نَعَمْ ‏.‏ ثُمَّ قَالَ مَا كُنْتُ أُرَى أَنَّ أَحَدًا يَرْوِي عَنْ مُحَمَّدِ بْنِ عَبْدِ اللَّهِ بْنِ عُبَيْدِ بْنِ عُمَيْرٍ ‏.‏

Abd ur-Rahman bin Bishr al-Abdī narrated to me, he said, I heard Muhammad bin Abd Allah bin Ubayd bin Umayr al-Laythī was mentioned near Yahyā bin Sa’īd al-Qattān, so he weakened him severely. Then it was said to Yahyā: ‘More weak than Ya’qūb bin Atā ’?’ He said: ‘Yes’. Then he said: ‘I did not see anyone transmitting on authority of Muhammad bin Abd Allah bin Ubayd bin Umayr’.