As I wrote in a previous post Armenia Land of the Horse, many ancient writers would refer to Armenia as a land of excelent horse mastery. Recently I stumbled upon a few quotes from classical writers attesting to this fact. 

Strabo 11.13.7

This, as well as Armenia, is an exceptionally good “horse-pasturing” country; and a certain meadow there is called “Horse-pasturing,” and those who travel from Persis and Babylon to Caspian Gates pass through it; and in the time of the Persians it is said that fifty thousand mares were pastured in it and that these herds belonged to the kings. As for the Nesaean horses, which the kings used because they were the best and the largest, some writers say that the breed came from here, while others say from Armenia.

Strabo 11.14.9

There are also other mines, in particular those of sandyx, [Note] as it is called, which is also called “Armenian” color, like chalce. The country is so very good for “horse-pasturing,” not even inferior to Media, that the Nesaean horses, which were used by the Persian kings, are also bred there. The satrap of Armenia used to send to the Persian king twenty thousand foals every year at the time of the Mithracina. Artavasdes (king of the Armenians), at the time when he invaded Media with Antony, showed him, apart from the rest of the cavalry, six thousand horses drawn up in battle array covered with complete armour.

NOTE: Sandyx is an earthy ore containing arsenic, which yields a bright red color.

Strabo 11.14.4

There is Phauene, (Phanenæ, Phasiana?) a province of Armenia, Comisene, and Orchistene, which furnishes large bodies of cavalry.

Strabo 11.14.12

The passion for riding and the care of horses characterize the Thessalians, and are common to Armenians and Medes.

George W. Mooney (1912) in his book Argonautica Apollonius Rhodius commented that Armenians sacrificed horses:

[1176] ἵππους δαίτρευον (horse sacrifice): The Armenians sacrificed Horses ( Xen. An. four. 5. thirty-five )

Referring to Xenophon, Anabasis (5th century B.C.) where he describes a following account in a village in Armenia:

Xenophon, Anabasis 4. 5. 35

Then Xenophon took the village chief back for the time to his own household, and gave him a horse that he had got when it was rather old, to fatten up and sacrifice, for he understood that it was sacred to the Sun-god. He did this out of fear that the horse might die, for it had been injured by the journey; and he took for himself one of the colts and gave his captains also a colt apiece.