Sahih al-Bukhari 619
صحيح البخاري#619SahihNarrated `Aisha:The Prophet (ﷺ) used to offer two light rak`at between the Adhan and the Iqama of the Fajr prayer
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: 10:17