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.
Having therefore himself picked out a hundred and fifty heavy-armed, and having put the rest under the command of Clearidas, he purposed making a sudden attack on the Athenians before they could retire; as he did not think that he should catch them again so isolated, if once their reinforcements should have joined them. Calling therefore all his soldiers together, and wishing to encourage them and acquaint them with his design, he spoke to the following effect:
Men of the Peloponnese, with regard to the character of the country from which we are come, namely, that through its bravery it has always been a free country, and that you are Dorians about to engage with Ionians, to whom you are habitually superior, let a brief declaration suffice.
But with regard to the present attack, I will explain in what way I purpose making it;
that the fact of your meeting the danger in small divisions, and not in one body, may not cause a want of courage by an appearance of weakness.