Warriors, Knights, and Horses
Shahnameh. (The Book of Kings)
Abolqasem Ferdowsi (932-1025CE)

Rostam and Rakhsh
Rostam does Battle with a dragon. Notice the role of Rakhsh, his horse, in the battle.

Other Sources

The entire text, as well as some background information.

Some other scenes from the epic.

The Princeton Shahnameh Project