The History Of Herodotus Volume 2 of 2
Page: 2029. At last however the answer was given and the going forth of the Spartans took place in the following manner:—on the day before that which was appointed for the last hearing of the envoys, Chileos a man of Tegea, who of all strangers had most influence in Lacedemon, heard from the Ephors all that which the Athenians were saying; and he, it seems, said to them these words: "Thus the matter stands, Ephors:—if the Athenians are not friendly with us but are allies of the Barbarian, then though a strong wall may have been built across the Isthmus, yet a wide door has been opened for the Persian into Peloponnesus. Listen to their request, however, before the Athenians resolve upon something else tending to the fall of Hellas.".
10. Thus he counselled them, and they forthwith took his words to heart; and saying nothing to the envoys who had come from the cities, while yet it was night they sent out five thousand Spartans, with no less than seven of the Helots set to attend upon each man of them, 901 appointing Pausanias the son of Cleombrotos to lead them forth. Now the leadership belonged to Pleistarchos the son of Leonidas; but he was yet a boy, and the other was his guardian and cousin: for Cleombrotos, the father of Pausanias and son of Anaxandrides, was no longer alive, but when he had led home from the Isthmus the army which had built the wall, no long time after this he died. Now the reason why Cleombrotos led home the army from the Isthmus was this:—as he was offering sacrifice for fighting against the Persian, the sun was darkened in the heaven. And Pausanias chose as commander in addition to himself Euryanax the son of Dorieos, a man of the same house..
11. So Pausanias with his army had gone forth out of Sparta; and the envoys, when day had come, not knowing anything of this going forth, came in before the Ephors meaning to depart also, each to his own State: and when they had come in before them they said these words: "Ye, O Lacedemonians, are remaining here and celebrating this Hyakinthia and disporting yourselves, having left your allies to destruction; and the Athenians being wronged by you and for want of allies will make peace with the Persians on such terms as they can: and having made peace, evidently we become allies of the king, and therefore we shall join with him in expeditions against any land to which the Persians may lead us; and ye will learn then what shall be the issue for you of this matter." When the envoys spoke these words, the Ephors said and confirmed it with an oath, that they supposed by this time the men were at Orestheion on their way against the strangers: for they used to call the Barbarians "strangers." 10 So they, not knowing of the matter, asked the meaning of these words, and asking they learnt all the truth; so that they were struck with amazement and set forth as quickly as possible in pursuit; and together with them five thousand chosen hoplites of the Lacedemonian "dwellers in the country round" 11 did the same thing also.