Sahih al-Bukhari 6298
صحيح البخاري#6298SahihNarrated Abu Huraira: Allah's Messenger (ﷺ) said "The Prophet) Abraham circumcised himself after he had passed the age of eighty years and he circumcised himself with an adze
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 79:70