Sahih al-Bukhari 544
صحيح البخاري#544SahihNarrated Aisha:Allah's Messenger (ﷺ) used to offer the `Asr prayer when the sunshine had not disappeared from my chamber
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: 9:21