Sahih al-Bukhari 6341
صحيح البخاري#6341SahihNarrated Anas, "The Prophet (ﷺ) raised his hands (in invocation) till I saw the whiteness of his armpits
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: 80:38