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.

"If any enemy invade the territory of the Athenians and be doing them harm, the Lacedaemonians shall help the Athenians in whatever way they can most effectively, with all their might; but if the enemy, after ravaging the country, shall have departed, that city shall be the enemy of the Lacedaemonians and Athenians, and shall suffer at the hands of both, and neither city shall make peace with it without the other.

These conditions shall be observed honestly, zealously, and without fraud. 3. "If there shall be an insurrection of slaves, the Athenians shall aid the Lacedaemonians with all their might, to the utmost of their power. 4.