Sahih al-Bukhari 591
صحيح البخاري#591SahihNarrated Hisham's father:`Aisha (addressing me) said, "O son of my sister! The Prophet (ﷺ) never missed two prostrations (i.e. rak`at) after the `Asr prayer in my house
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: 9:66