وَحَدَّثَنِي عُبَيْدُ اللَّهِ بْنُ سَعِيدٍ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ، - يَعْنِي ابْنَ مَهْدِيٍّ - حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، عَنِ ابْنِ عَوْنٍ، قَالَ قَالَ لَنَا إِبْرَاهِيمُ إِيَّاكُمْ وَالْمُغِيرَةَ بْنَ سَعِيدٍ وَأَبَا عَبْدِ الرَّحِيمِ فَإِنَّهُمَا كَذَّابَانِ ‏.‏

Ubayd Allah bin Sa’īd narrated to me, Abd ur-Rahman- meaning Ibn Mahdī- narrated to us, Hammād bin Zayd narrated to us, on authority of Ibn Awn, he said, Ibrāhīm said to us: ‘Beware of al-Mughīrah bin Sa’īd and Abū Abd ar-Rahīm for they are both liars’.

— Sahih Muslim, Book 0: Introduction, Hadith #7417