Sahih al-Bukhari 5905
Book 77: Dress · Narrated by Qatada
Arabic
حَدَّثَنِي عَمْرُو بْنُ عَلِيٍّ، حَدَّثَنَا وَهْبُ بْنُ جَرِيرٍ، قَالَ حَدَّثَنِي أَبِي، عَنْ قَتَادَةَ، قَالَ سَأَلْتُ أَنَسَ بْنَ مَالِكٍ ـ رضى الله عنه ـ عَنْ شَعَرِ، رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ كَانَ شَعَرُ رَسُولِ اللَّهِ صلى الله عليه وسلم رَجِلاً، لَيْسَ بِالسَّبِطِ، وَلاَ الْجَعْدِ، بَيْنَ أُذُنَيْهِ وَعَاتِقِهِ.
English translation
Narrated Qatada:l asked Anas bin Malik about the hair of Allah's Messenger (ﷺ). He said, "The hair of Allah's Messenger (ﷺ) was neither much straight, nor much curly, and it used to hang down till between his shoulders and his earlobes
Reference: Sahih al-Bukhari 5905, Book of Dress. English translation by Dr. Muhammad Muhsin Khan.