The Book of Virtue, Enjoining Good Manners, and Joining of the Ties of Kinship
حَدَّثَنِيهِ أَبُو بَكْرِ بْنُ إِسْحَاقَ، حَدَّثَنَا أَبُو مُسْهِرٍ، حَدَّثَنَا سَعِيدُ بْنُ عَبْدِ الْعَزِيزِ، بِهَذَا الإِسْنَادِ غَيْرَ أَنَّ مَرْوَانَ أَتَمُّهُمَا حَدِيثًا .The hadith is narrated through Abu Mushir from Sa'id bin 'Abdil'Aziz except that the previous hadith through Marwan was the more complete of the two
From Sahih Muslim, whose reports the scholars accept as authentic.