Histories

The Libyans, too, were armed like the men of their infantry, and all of them also drove chariots. In the same manner the Caspians and Paricanians were armed as the men of their infantry. The Arabians had the same equipment as the men of their infantry, and all of them rode on camels no less swift than horses.

These nations alone were on horseback; the number of the horsemen was shown to be eighty thousand, besides the camels and the chariots. All the rest of the horsemen were ranked with their companies, but the Arabians were posted last. Since horses cannot endure camels, their place was in the rear, so that the horses would not be frightened.