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.
"There shall be safe conduct for herald and envoys and their attendants, as many as shall seem proper, on their way to the Peloponnesus and to Athens for the purpose of bringing the war to an end and for the arbitration of disputes, both going and coming, by land and by sea.
"Deserters shall not be received during this time, whether freemen or slaves, either by you or by us.
"You shall give satisfaction to us and we to you according to our ancestral customs, settling disputed points by arbitration without war.