Sahih al-Bukhari 6617
صحيح البخاري#6617SahihNarrated `Abdullah:When taking an oath, the Prophet (ﷺ) very often used to say, "No, by Him Who turns the hearts
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: 82:23