Strabo Geography 11.13.6

[6] Greater Media is bounded on the east by Parthia and the mountains of the Cossaei, a predatory people, who once supplied the Elymaei, with whom they were allies in the war against the Susians and Babylonians, with thirteen thousand bowmen. Nearchus ¹ says that there were four predatory tribes and that of these the Mardi were situated next to the Persians; the Uxii and Elymaei next to the Mardi and the Susians; and the Cossaei next to the Medians; and that whereas all four exacted tribute from the kings, the Cossaei also received gifts at the times when the king, after spending the summer in Ecbatana, went down into Babylonia; but that Alexander put an end to their great audacity when he attacked them in the winter time. So then, Greater Media is bounded on the east by these tribes, and also by the Paraetaceni, who border on the Persians and are themselves likewise mountaineers and predatory; on the north by the Cadusii who live above the Hyrcanian Sea, and by the other tribes which I have just described; on the south by Apollioniatis, which the ancients called Sitacene, and by the mountain Zagrus, at the place where Massabatice is situated, which belongs to Media, though some say that it belongs to Elymaea; and on the west by the Atropatii and certain of the Armenians. There are also some Greek cities in Media, founded by the Macedonians, among which are Laodiceia, Apameia and the city ² near Rhagae, and Rhaga ³ itself, which was founded by Nicator. ⁴ By him it was named Europus, but by the Parthians Arsacia; it lies about five hundred stadia to the south of the Caspian Gates, according to Apollodorus of Artemita.