Rock Relief of Shapur I at Naqs-i Rajab, Persia
Shapur I. The four warriors behind the king are most likely from a royal Savaran unit. (Author's photo at Naghsh-e-Rajab).
Source: p.7, Sassanian Elite Cavalry AD 224-642 by Kaveh Farrokh
See also a Sassanid Rock Relief of the Investiture of Ardashir at Naqsh-i Rustam, 224-241AD
Ancient Illustrations of Costume & Soldiers
Persian Illustrations of Costume & Soldiers