Histories

In the previous war the Lacedaemonians continually fought unsuccessfully against the Tegeans, but in the time of Croesus and the kingship of Anaxandrides and Ariston in Sparta [22.416,37.83] (inhabited place), Laconia, Peloponnese, Greece, Europe Lacedaemon the Spartans had gained the upper hand. This is how:

when they kept being defeated by the Tegeans, they sent ambassadors to Delphi [22.5167,38.4917] (Perseus) Delphi to ask which god they should propitiate to prevail against the Tegeans in war. The Pythia responded that they should bring back the bones of Orestes, son of Agamemnon.