Sahih al-Bukhari 546
صحيح البخاري#546SahihNarrated Aisha:The Prophet (ﷺ) used to pray the `Asr prayers at a time when the sunshine was still inside my chamber and no shadow had yet appeared in it
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: 9:23