Sahih al-Bukhari 1711
صحيح البخاري#1711SahihNarrated Nafi`:Ibn `Umar used to send his Hadi from Jam' (to Mina) in the last third of the night with the pilgrims amongst whom there were free men and slaves, till it was taken into the Manhar (slaughtering place) of the Prophet (ﷺ)
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: 25:189