Hadith
حَدَّثَنَا شَيْبَانُ بْنُ فَرُّوخَ، حَدَّثَنَا جَرِيرُ بْنُ حَازِمٍ، حَدَّثَنَا قَتَادَةُ، قَالَ قُلْتُ لأَنَسِ بْنِ مَالِكٍ كَيْفَ كَانَ شَعَرُ رَسُولِ اللَّهِ صلى الله عليه وسلم قَالَ كَانَ شَعَرًا رَجِلاً لَيْسَ بِالْجَعْدِ وَلاَ السَّبِطِ بَيْنَ أُذُنَيْهِ وَعَاتِقِهِ .
Qatada reported:I asked Anas b. Malik: How was the hair of Allah's Messenger (ﷺ)? Thereupon he said: His hair was neither very curly nor very straight, and they hung over his shoulders and earlobes
Sahih
Sahih Muslim 6067 ·Book 43, Hadith 125·Also available on sunnah.com·