Histories

Herodotus

Herodotus. Godley, Alfred Denis, translator. Cambridge, MA; London: Harvard University Press; William Heinemann, Ltd., 1920-1925 (printing).

These were the generals of the whole infantry, except the Ten Thousand. Hydarnes son of Hydarnes was general of these picked ten thousand Persians, who were called Immortals for this reason: when any one of them was forced to fall out of the number by death or sickness, another was chosen so that they were never more or fewer than ten thousand.