Abu Huraira reported Messenger of Allah ﷺ as having said that Ibrahim (as) circumcised himself with the help of an adze when he was eighty years old.  

قَالَ رَسُولُ اللَّهِ ﷺ اخْتَتَنَ إِبْرَاهِيمُ النَّبِيُّ عَلَيْهِ السَّلاَمُ وَهُوَ ابْنُ ثَمَانِينَ سَنَةً بِالْقَدُومِ  

[Machine] Ibrahim was circumcised after twenty and one hundred years by birth and then lived for eighty years after that.  

«اخْتَتَنَ إِبْرَاهِيمُ بَعْدَ عِشْرِينَ وَمِائَةِ سَنَةٍ بِالْقَدُومِ ثُمَّ عَاشَ بَعْدَ ذَلِكَ ثَمَانِينَ سَنَةً»  

[Machine] The Prophet ﷺ said, "Prophet Ibrahim circumcised himself when he reached the age of 120 and lived for eighty years after that, and he circumcised with a knife."  

عَنْ رَسُولِ اللَّهِ ﷺ قَالَ «اخْتَتَنَ إِبْرَاهِيمُ النَّبِيُّ ﷺ حِينَ بَلَغَ عِشْرِينَ وَمِائَةَ سَنَةٍ وَعَاشَ بَعْدَ ذَلِكَ ثَمَانِينَ سَنَةً وَاخْتَتَنَ بِالْقَدُومِ»  

Abu Huraira reported Messenger of Allah ﷺ as having said that Ibrahim (as) circumcised himself with the help of an adze when he was eighty years old. (Using translation from Muslim 2370)   

"اختتن إبراهيمُ عليه السلامُ وهو ابن ثمانين سنةً بالقدُوم " .