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.
And so, on that occasion, the Mantineans reached with their wing far beyond the Sciritae, and the Lacedaemonians and Tegeans farther still beyond the Athenians, inasmuch as their army was larger than theirs.