The above mentioned narration has also been narrated by Mansur through a different chain of narrators. This version has:
Then two girls from Banu ‘Abd al-Muttalib came fighting together. He caught them. ‘Uthman (a narrator) said: He separated them. And Dawud (another narrator) said: He pulled away from the other, but he paid no attention to that.

حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، وَدَاوُدُ بْنُ مِخْرَاقٍ الْفِرْيَابِيُّ، قَالاَ حَدَّثَنَا جَرِيرٌ، عَنْ مَنْصُورٍ، بِهَذَا الْحَدِيثِ بِإِسْنَادِهِ قَالَ فَجَاءَتْ جَارِيَتَانِ مِنْ بَنِي عَبْدِ الْمُطَّلِبِ اقْتَتَلَتَا فَأَخَذَهُمَا - قَالَ عُثْمَانُ فَفَرَّعَ بَيْنَهُمَا وَقَالَ دَاوُدُ - فَنَزَعَ إِحْدَاهُمَا مِنَ الأُخْرَى فَمَا بَالَى ذَلِكَ .