Sahih al Bukhari 1730
Hajj (Pilgrimage)
حَدَّثَنَا أَبُو عَاصِمٍ، عَنِ ابْنِ جُرَيْجٍ، عَنِ الْحَسَنِ بْنِ مُسْلِمٍ، عَنْ طَاوُسٍ، عَنِ ابْنِ عَبَّاسٍ، عَنْ مُعَاوِيَةَ ـ رضى الله عنهم ـ قَالَ قَصَّرْتُ عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم بِمِشْقَصٍ.
Narrated Muawiya:I cut short the hair of Allah's Messenger (ﷺ) with a long blade
Text from the public-domain hadith-api dataset. Numbering follows that dataset and can differ by a few from some printed editions — check the wording, not only the number.