Al-Bahi said: On the day of Badr there were two horsemen with the Messenger of Allah (peace and blessings be upon him): al-Zubayr bin al-Awwam on a horse on the right flank, and al-Miqdad bin al-Aswad on a horse on the left flank.
Hadith Referenceالمعجم الكبير للطبراني / العشرة / 230