Ash-Shama'il Al-Muhammadiyah 30
Ibn 'Abbas said:
“Allah’s Messenger(Allah bless him and give him peace) used to let his hair hang down [over his face], whereas the polytheists used to part the hair of their heads. The People of the Scripture also used to let the hair of their heads hang down, and he used favor emulating the People of the Scripture with respect to things about which nothing was commanded, but Allah’s Messenger (Allah bless him and give him peace) then parted the hair of his head.”
حَدَّثَنَا سُوَيْدُ بْنُ نَصْرٍ ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ الْمُبَارَكِ ، عَنْ يُونُسَ بْنِ يَزِيدَ ، عَنِ الزُّهْرِيِّ ، قَالَ : حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ عَبْدِ اللَّهِ بْنِ عُتْبَةَ ، عَنِ ابْنِ عَبَّاسٍ : 
" أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يُسْدِلُ شَعْرَهُ ، وَكَانَ الْمُشْرِكُونَ يَفْرِقُونَ رُءُوسَهُمْ ، وَكَانَ أَهْلُ الْكِتَابِ يُسْدِلُونَ رُءُوسَهُمْ ، وَكَانَ يُحِبُّ مُوَافَقَةَ أَهْلِ الْكِتَابِ فِيمَا لَمْ يُؤْمَرْ فِيهِ بِشَيْءٍ ، ثُمَّ فَرَقَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ رَأْسَهُ ".