Rabi’ah ibn Abdur Rahman reported: I heard Anas ibn Malik describing the Prophet, peace and blessings be upon him, saying, “He was of medium height among people, neither tall nor short. He had a rosy color, neither fully white nor deep brown. His hair was neither completely curly, nor quite lank. Divine inspiration was revealed to him when he was forty years old. He stayed for ten years in Mecca receiving inspiration, and he stayed ten years in Medina. When he passed away, he had less than twenty white hairs on his head and beard.”
Source: Ṣaḥīḥ al-Bukhārī 3354
Grade: Sahih (authentic) according to Al-Bukhari
عَنْ رَبِيعَةَ بْنِ أَبِي عَبْدِ الرَّحْمَنِ قَالَ سَمِعْتُ أَنَسَ بْنَ مَالِكٍ يَصِفُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ كَانَ رَبْعَةً مِنْ الْقَوْمِ لَيْسَ بِالطَّوِيلِ وَلَا بِالْقَصِيرِ أَزْهَرَ اللَّوْنِ لَيْسَ بِأَبْيَضَ أَمْهَقَ وَلَا آدَمَ لَيْسَ بِجَعْدٍ قَطَطٍ وَلَا سَبْطٍ رَجِلٍ أُنْزِلَ عَلَيْهِ وَهُوَ ابْنُ أَرْبَعِينَ فَلَبِثَ بِمَكَّةَ عَشْرَ سِنِينَ يُنْزَلُ عَلَيْهِ وَبِالْمَدِينَةِ عَشْرَ سِنِينَ وَقُبِضَ وَلَيْسَ فِي رَأْسِهِ وَلِحْيَتِهِ عِشْرُونَ شَعَرَةً بَيْضَاءَ
3354 صحيح البخاري كتاب المناقب باب صفة النبي صلى الله عليه وسلم