ENOfficial
Ibn Abbas reported that Mu'awiya had said to them: Do you know that I clipped some hair from the head of Allah's Messenger (ﷺ) at al- Marwa with the help of a clipper? I said: I do not know it except as it verdict against you.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عَمْرٌو النَّاقِدُ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنْ هِشَامِ بْنِ حُجَيْرٍ، عَنْ طَاوُسٍ، قَالَ قَالَ ابْنُ عَبَّاسٍ قَالَ لِي مُعَاوِيَةُ أَعَلِمْتَ أَنِّي قَصَّرْتُ مِنْ رَأْسِ رَسُولِ اللَّهِ صلى الله عليه وسلم عِنْدَ الْمَرْوَةِ بِمِشْقَصٍ فَقُلْتُ لَهُ لاَ أَعْلَمُ هَذَا إِلاَّ حُجَّةً عَلَيْكَ .
sunnah.com