History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
"As to the offering to the god,[*](Apollo Pythaeus; cf. ch. liii.) if they wish they shall impose an oath upon the Epidaurians;
but if not, they shall swear it themselves. 5. "The cities in the Peloponnesus, both small and great, shall all be independent according to their hereditary usages. 6.
"If anyone from outside the Peloponnesus comes against Peloponnesian territory with evil intent, they shall repel the invader, taking counsel together, in whatever way shall seem to the Peloponnesians most just. 7.