Histories
Herodotus
Herodotus. Godley, Alfred Denis, translator. Cambridge, MA; London: Harvard University Press; William Heinemann, Ltd., 1920-1925 (printing).
What calamity befell the Athenians for dealing in this way with the heralds I cannot say, save that their land and their city were laid waste. I think, however, that there was another reason for this, and not the aforesaid.[*](Possibly the burning of the temple at Sardis [28.0167,38.475] (Perseus) Sardis (Hdt. 5.102).)
Be that as it may, the anger of Talthybius, Agamemnon's herald, fell upon the Lacedaemonians. At Sparta [22.4417,37.0667] (Perseus) Sparta there is a shrine of Talthybius and descendants of Talthybius called Talthybiadae, who have the special privilege of conducting all embassies from Sparta [22.4417,37.0667] (Perseus) Sparta.
Now there was a long period after the incident I have mentioned above during which the Spartans were unable to obtain good omens from sacrifice. The Lacedaemonians were grieved and dismayed by this and frequently called assemblies, making a proclamation inviting some Lacedaemonian to give his life for Sparta [22.4417,37.0667] (Perseus) Sparta. Then two Spartans of noble birth and great wealth, Sperthias son of Aneristus and Bulis son of Nicolaus, undertook of their own free will to make atonement to Xerxes for Darius' heralds who had been killed at Sparta [22.4417,37.0667] (Perseus) Sparta.