Pausanias Description of Greece 4.15.6

[6]
  The Spartans received an oracle from Delphi that they should procure the Athenian as counsellor. So they sent messengers to Athens to announce the oracle, asking for a man to advise what they must do. The Athenians, who were not anxious either that the Lacedaemonians should add to their possessions the best part of Peloponnese without great dangers, or that they themselves should disobey the god, made their plans accordingly. There was a man Tyrtaeus, a teacher of letters, who was considered of poor intellect and was lame in one foot. Him they sent to Sparta . On his arrival he recited his poems in elegiacs and anapaests to the nobles in private and to all whom he could collect.

[6] The Spartans received an oracle from Delphi that they should procure the Athenian as counsellor. So they sent messengers to Athens to announce the oracle, asking for a man to advise what they must do. The Athenians, who were not anxious either that the Lacedaemonians should add to their possessions the best part of Peloponnese without great dangers, or that they themselves should disobey the god, made their plans accordingly. There was a man Tyrtaeus, a teacher of letters, who was considered of poor intellect and was lame in one foot. Him they sent to Sparta. On his arrival he recited his poems in elegiacs and anapaests to the nobles in private and to all whom he could collect.