Sahih al-Bukhari 2851
صحيح البخاري#2851SahihNarrated Anas bin Malik:Allah's Messenger (ﷺ) said, "There is a blessing in the fore-heads of horses
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: 56:67