Shama'il al-Muhammadiya 29

Ibne Abbas (may Allah be pleased with him) says:
"Messenger of Allah ﷺ used to leave his hair the way it naturally was, without making a path in the hair (parting hair). The reason being that the mushrikeen (polytheists) used to make a path in their hair, and the Ahlul Kitaab (People of the Book) did not do so. In the early periods Messenger of Allah ﷺ preferred to follow the Ahlul Kitaab, rather than others, in matters where no command had came from Allah. Later this was abrogated, and Messenger of Allah ﷺ began apposing the ways of the Ahlul Kitaab after this".

حَدَّثَنَا سُوَيْدُ بْنُ نَصْرٍ نُ للّعَبْدِ اَهِ بْنِ عُتْبَةَ، عَنِ ابْنِ عَبَّاسٍ: أَنَّ رَسُولَ اللهِ ﷺ كَانَ يُسْدِلُ شَعَرَهُ، حَدَّثَنَا عَبْدُ اللهِ بْنُ الْمُبَارَكِ، عَنْ يُونُسَ بْنِ يَزِيدَ، عَنِ الزُّهْرِيِّ، قَالَ: حَدَّثَنَا عُبَيْدُ اللهِ بْوَكَانَ الْمُشْرِكُونَ يَفْرِقُونَ رُؤُوسَهُمْ، وَكَانَ أَهْلُ الْكِتَابِ يُسْدِلُونَ رُؤُوسَهُمْ، وَكَانَ يُحِبُّ مُوَافَقَةَ أَهْلِ الْكِتَابِ فِيمَا لَمْ يُؤْمَرْ فِيهِ بِشَيْءٍ، ثُمَّ فَرَقَ رَسُولُ اللهِ ﷺ رَأْسَهُ.