From Sahih Bukhari (Hadith 5966):
Narrated Aiyub:The worst of three (persons riding one, animal) was mentioned in `Ikrima's presence `Ikrima said, "Ibn `Abbas said, '(In the year of the conquest of Mecca) the Prophet (ﷺ) came and mounted Qutham in front of him and Al-Fadl behind him, or Qutham behind him and Al-Fadl in front of him.' Now which of them was the worst off and which was the best?
Reference: Bukhari 5966