Sahih al-Bukhari 4298
صحيح البخاري#4298SahihNarrated Ibn `Abbas:The Prophet (ﷺ) stayed in Mecca for 19 days during which he prayed 2 rak`at in each 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: 64:331