Sahih Muslim 2370
Sahih Muslim · Book 43: The Book of Virtues · The Virtues Of Ibrahim, Peace Be Upon Him
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ ، حَدَّثَنَا الْمُغِيرَةُ، - يَعْنِي ابْنَ عَبْدِ الرَّحْمَنِ الْحِزَامِيَّ - عَنْ أَبِي الزِّنَادِ ، عَنِ الأَعْرَجِ ، عَنْ أَبِي هُرَيْرَةَ ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " اخْتَتَنَ إِبْرَاهِيمُ النَّبِيُّ عَلَيْهِ السَّلاَمُ وَهُوَ ابْنُ ثَمَانِينَ سَنَةً بِالْقَدُومِ " .
Abu Huraira reported Allah's Messenger (ﷺ) as having said that Ibrahim (as) circumcised himself with the help of an adze when he was eighty years old.