Strabo, Geography

Now in early times the Sogdians and Bactrians did not differ much from the nomads in their modes of life and customs, although the Bactrians were a little more civilized; however, of these, as of the others, Onesicritus¹ does not report their best traits, saying, for instance, that those who have become helpless because of old age or sickness are thrown out alive as prey to dogs kept expressly for this purpose, which in their native tongue are called "under-takers," and that while the land outside the walls of the metropolis of the Bactrians looks clean, yet most of the land inside the walls is full of human bones; but that Alexander broke up the custom. And the reports about the Caspians are similar, for instance, that when parents live beyond seventy years they are shut in and starved to death. Now this latter custom is more tolerable; and it is similar to that of the Ceians,² although it is of Scythian origin; that of the Bactrians, however, is still more like that of the Scythians. And so, if it was proper to be in doubt as to the facts at the time when Alexander was finding such customs there, what should one say as to what sort of customs were probably in vogue among them in the time of the earliest Persian rulers and the still earlier rulers?