Srimad Bhagavatam Canto 05, Chapter 21, Text 16

SB 5.21.16

purastat savitur arunah pascac ca niyuktah sautye karmani kilaste.
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Although Arunadeva sits in front of the sun-god and is engaged in driving the chariot and controlling the horses, he looks backward toward the sun-god.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
In the Vayu Purana the position of the horses is described:
 
saptasva-rupa-cchandamsi
 vahante vamato ravim
cakra-paksa-nibaddhani
 cakre vaksah samahitah
 
Although Arunadeva is in the front seat, controlling the horses, he looks back toward the sun-god from his left side.
Srimad Bhagavatam Canto 05, Chapter 21, Text 15
Srimad Bhagavatam Canto 05, Chapter 21, Text 17