The History Of Herodotus Volume 2 of 2
Page: 142208. As they were thus deliberating, Xerxes sent a scout on horseback to see how many they were in number and what they were doing; for he had heard while he was yet in Thessaly that there had been assembled in this place a small force, and that the leaders of it were Lacedemonians together with Leonidas, who was of the race of Heracles. And when the horseman had ridden up towards their camp, he looked upon them and had a view not indeed of the whole of their army, for of those which were posted within the wall, which they had repaired and were keeping a guard, it was not possible to have a view, but he observed those who were outside, whose station was in front of the wall; and it chanced at that time that the Lacedemonians were they who were posted outside. So then he saw some of the men practising athletic exercises and some combing their long hair: and as he looked upon these things he marvelled, and at the same time he observed their number: and when he had observed all exactly, he rode back unmolested, for no one attempted to pursue him and he found himself treated with much indifference. And when he returned he reported to Xerxes all that which he had seen.
209. Hearing this Xerxes was not able to conjecture the truth about the matter, namely that they were preparing themselves to die and to deal death to the enemy so far as they might; but it seemed to him that they were acting in a manner merely ridiculous; and therefore he sent for Demaratos the son of Ariston, who was in his camp, and when he came, Xerxes asked him of these things severally, desiring to discover what this was which the Lacedemonians were doing: and he said: "Thou didst hear from my mouth at a former time, when we were setting forth to go against Hellas, the things concerning these men; and having heard them thou madest me an object of laughter, because I told thee of these things which I perceived would come to pass; for to me it is the greatest of all ends to speak the truth continually before thee, O king. Hear then now also: these men have come to fight with us for the passage, and this is it that they are preparing to do; for they have a custom which is as follows;—whenever they are about to put their lives in peril, then they attend to the arrangement of their hair. Be assured however, that if thou shalt subdue these and the rest of them which remain behind in Sparta, there is no other race of men which will await thy onset, O king, or will raise hands against thee: for now thou art about to fight against the noblest kingdom and city of those which are among the Hellenes, and the best men." To Xerxes that which was said seemed to be utterly incredible, and he asked again a second time in what manner being so few they would fight with his host. He said; "O king, deal with me as with a liar, if thou find not that these things come to pass as I say."