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.
And when this became known to the Mytilenaean[*](cf. 3.28.1.) envoys who were present and their Athenian supporters, they induced those in authority to bring the question before the people again; and they found less difficulty in persuading them because it was evident to them also that the greater part of the citizens wished that another opportunity should be given them to consider the matter.
A meeting of the assembly was held immediately, at which various opinions were expressed by the several speakers. One of these was Cleon son of Cleaenetus, who had been successful in carrying the earlier motion to put the Mytilenaeans to death. He was not only the most violent of the citizens, but at that time had by far the greatest influence with the people. He now came forward a second time and spoke as follows: