How Should It Be Cut?

It was narrated that Muawiyah said:

"I cut a little from the ends of the hair of the Messenger of Allah with the eduge of an arrow that I had with me, after he had circumambulated the House, and performed Sai between As-Safa and Al-Marwah, during the ten days." Qais said: "The people rebuked Muawiyah for that."

أَخْبَرَنَا مُحَمَّدُ بْنُ مَنْصُورٍ، قَالَ حَدَّثَنَا الْحَسَنُ بْنُ مُوسَى، قَالَ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، عَنْ قَيْسِ بْنِ سَعْدٍ، عَنْ عَطَاءٍ، عَنْ مُعَاوِيَةَ، قَالَ أَخَذْتُ مِنْ أَطْرَافِ شَعْرِ رَسُولِ اللَّهِ ﷺ بِمِشْقَصٍ كَانَ مَعِي بَعْدَ مَا طَافَ بِالْبَيْتِ وَبِالصَّفَا وَالْمَرْوَةِ فِي أَيَّامِ الْعَشْرِ . قَالَ قَيْسٌ وَالنَّاسُ يُنْكِرُونَ هَذَا عَلَى مُعَاوِيَةَ .