question #2 Sahih al-Bukhari 1711, Book 25, Hadith 189 : How did Ibn `Umar practice the ritual of sending the Hadi with both free men and slaves?

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) .