Sahih al-Bukhari 2949
صحيح البخاري#2949SahihKa`b bin Malik used to say:"Scarcely did Allah's Messenger (ﷺ) set out for a journey on a day other than Thursday
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: 56:161