Sunan an-Nasa'i 5233
It was narrated that Al-Bara' said:
"I never saw any long haired man in a Hullah who was more handsome than the Messenger of Allah [SAW], and he had hair that came down to his shoulders."
أَخْبَرَنَا حَاجِبُ بْنُ سُلَيْمَانَ، عَنْ وَكِيعٍ، عَنْ سُفْيَانَ، عَنْ أَبِي إِسْحَاقَ، عَنِ الْبَرَاءِ، قَالَ مَا رَأَيْتُ مِنْ ذِي لِمَّةٍ أَحْسَنَ فِي حُلَّةٍ مِنْ رَسُولِ اللَّهِ صلى الله عليه وسلم وَلَهُ شَعْرٌ يَضْرِبُ مَنْكِبَيْهِ ‏.‏