عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ: قُبِضَ رَسُولُ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ وَهُوَ ابْنُ ثَلَاثٍ وَسِتِّينَ، وَأَبُو بَكْرٍ وَهُوَ ابْنُ ثَلَاثٍ وَسِتِّينَ، وَعُمَرُ وَهُوَ ابْنُ ثَلَاثٍ وَسِتِّينَ(مسلم شریف: ۲۳۴۸)
Translation
Hazrat Anas bin Malik (R.A) says that when the Prophet (PBUH) passed away, he was sixty-three years old, Abu Bakr Siddiq (R.A) also passed away at the age of sixty-three and Umar (R.A) also passed away at the very age of sixty-three. (Tafheem-ul-Muslim)