History of the Peloponnesian War
Thucydides
Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.
Ath.
On this point you, as well as others, may learn by actual experience, and not remain ignorant, that from no single siege did the Athenians ever yet retreat through fear of others.