Anas b. Malik reported that Messenger of Allah ﷺ was neither very conspicuously tall nor short-statured, and his color was neither glaringly white nor brown; his hair was neither very curly nor very straight; Allah commissioned him (as a Prophet) when he had reached the age of forty years, and he stayed in Mecca for ten years and for ten years in Medina; Allah took him away when he had just reached the age of sixty, and there had not been twenty white hair in his head and beard.  

أَنَّهُ سَمِعَهُ يَقُولُ كَانَ رَسُولُ اللَّهِ ﷺ لَيْسَ بِالطَّوِيلِ الْبَائِنِ وَلاَ بِالْقَصِيرِ وَلَيْسَ بِالأَبْيَضِ الأَمْهَقِ وَلاَ بِالآدَمِ وَلاَ بِالْجَعْدِ الْقَطَطِ وَلاَ بِالسَّبِطِ بَعَثَهُ اللَّهُ عَلَى رَأْسِ أَرْبَعِينَ سَنَةً فَأَقَامَ بِمَكَّةَ عَشْرَ سِنِينَ وَبِالْمَدِينَةِ عَشْرَ سِنِينَ وَتَوَفَّاهُ اللَّهُ عَلَى رَأْسِ سِتِّينَ سَنَةً وَلَيْسَ فِي رَأْسِهِ وَلِحْيَتِهِ عِشْرُونَ شَعْرَةً بَيْضَاءَ  

This hadith has been transmitted on the authority of Anas b. Malik with this addition that instead of the word al-Amhaq there is the word Azhar.  

عَنْ أَنَسِ بْنِ مَالِكٍ بِمِثْلِ حَدِيثِ مَالِكِ بْنِ أَنَسٍ وَزَادَ فِي حَدِيثِهِمَا كَانَ أَزْهَرَ