Sahih Bukhari 3944

حَدَّثَنَا عَبْدَانُ ، حَدَّثَنَا عَبْدُ اللَّهِ ، عَنْ يُونُسَ ، عَنْ الزُّهْرِيِّ ، قَالَ : أَخْبَرَنِي عُبَيْدُ اللَّهِ بْنُ عَبْدِ اللَّهِ بْنِ عُتْبَةَ ، عَنْ عَبْدِ اللَّهِ بْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا ، أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يَسْدِلُ شَعْرَهُ وَكَانَ الْمُشْرِكُونَ يَفْرُقُونَ رُءُوسَهُمْ , وَكَانَ أَهْلُ الْكِتَابِ يَسْدِلُونَ رُءُوسَهُمْ , وَكَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُحِبُّ مُوَافَقَةَ أَهْلِ الْكِتَابِ فِيمَا لَمْ يُؤْمَرْ فِيهِ بِشَيْءٍ , ثُمَّ فَرَقَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ رَأْسَهُ .

Narrated `Abdullah bin `Abbas: The Prophet used to keep his hair falling loose while the pagans used to part their hair, and the People of the Scriptures used to keep their hair falling loose, and the Prophet liked to follow the People of the Scriptures in matters about which he had not been instructed differently, but later on the Prophet started parting his hair.