Sahih al-Bukhari 6462
صحيح البخاري#6462SahihNarrated `Aisha:The most beloved action to Allah's Messenger (ﷺ) was that whose doer did it continuously and regularly
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: 81:51