As well as including travellers’ tales in his work, Herodotus tells us about the customs of other people. Here is some of what he says about the Persians:
The customs which I know the Persians to observe are the following. They have no images of the gods, no temples nor altars, and consider the use of them a sign of folly. This comes, I think, from their not believing the gods to have the same nature with men, as the Greeks imagine. Their custom, however, is to ascend the summits of the loftiest mountains, and there to offer sacrifice to Jupiter, which is the name they give to the whole circuit of the firmament. They likewise offer to the sun and moon, to the earth, to fire, to water, and to the winds. These are the only gods whose worship has come down to them from ancient times. At a later period they began the worship of Urania, which they borrowed from the Arabians and Assyrians. Mylitta is the name by which the Assyrians know this goddess, whom the Arabians call Alitta, and the Persians Mitra.
Of all the days in the year, the one which they celebrate most is their birthday. It is customary to have the board furnished on that day with an ampler supply than normal. The richer Persians cause an ox, a horse, a camel, and an ass to be baked whole and so served up to them; the poorer classes use instead the smaller kinds of cattle. They eat little solid food but abundance of dessert, which is set on the table a few dishes at a time; this it is which makes them say that “the Greeks, when they eat, leave off hungry, having nothing worth mention served up to them after the meats; whereas, if they had more put before them, they would not stop eating.” They are very fond of wine, and drink it in large quantities. To vomit or obey natural calls in the presence of another, is forbidden among them. Such are their customs in these matters.
It is also their general practice to deliberate upon affairs of weight when they are drunk; and then on the morrow, when they are sober, the decision to which they came the night before is put before them by the master of the house in which it was made; and if it is then approved of, they act on it; if not, they set it aside. Sometimes, however, they are sober at their first deliberation, but in this case they always reconsider the matter under the influence of wine.
There is no nation which so readily adopts foreign customs as the Persians. Thus, they have taken the dress of the Medes, considering it superior to their own; and in war they wear the Egyptian breastplate. As soon as they hear of any luxury, they instantly make it their own.