وَحَدَّثَنِي نَصْرُ بْنُ عَلِيٍّ، حَدَّثَنَا بِشْرٌ، - يَعْنِي ابْنَ مُفَضَّلٍ - حَدَّثَنَا خَالِدٌ الْحَذَّاءُ، حَدَّثَنَا عَمَّارٌ، مَوْلَى بَنِي هَاشِمٍ حَدَّثَنَا ابْنُ عَبَّاسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم تُوُفِّيَ وَهُوَ ابْنُ خَمْسٍ وَسِتِّينَ ‏.‏

Ammar, the freed slave of Banu Hashim, reported that Ibn 'Abbas said that Allah's Messenger (PBUH) died when he had attained the age of sixty-five. Translation Not Available

Book Ref: Sahih Muslim Book 43 Hadith 5807
Web Ref:  Sahih Muslim Book 30 Hadith 2353 c