Sahih al-Bukhari 3356
صحيح البخاري#3356SahihNarrated Abu Huraira:Allah's Messenger (ﷺ) said, "Abraham did his circumcision with an adze* at the age of eighty." Narrated Abu Az-Zinad: (as above) With an adze*. * a type of curved blade axe
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: 60:31