Sahih Muslim · Book 43 · Hadith 2336 a
حَدَّثَنَا مَنْصُورُ بْنُ أَبِي مُزَاحِمٍ، وَمُحَمَّدُ بْنُ جَعْفَرِ بْنِ زِيَادٍ، قَالَ مَنْصُورٌ حَدَّثَنَا وَقَالَ، ابْنُ جَعْفَرٍ أَخْبَرَنَا إِبْرَاهِيمُ، - يَعْنِيَانِ ابْنَ سَعْدٍ - عَنِ ابْنِ شِهَابٍ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ، اللَّهِ عَنِ ابْنِ عَبَّاسٍ، قَالَ كَانَ أَهْلُ الْكِتَابِ يَسْدُلُونَ أَشْعَارَهُمْ وَكَانَ الْمُشْرِكُونَ يَفْرُ…
Ibn Abbas reported that the People of the Book used to let their hair fall (on their foreheads) and the polytheists used to part them on their heads, and Allah's Messenger (ﷺ) liked to conform his behaviour to the People…