History of the Peloponnesian War

The ambassadors of the Syracusians, which after the taking of Plemmyrium had been sent unto the cities about, having now obtained and levied an army amongst them, were conducting the same to Syracuse. But Nicias, upon intelligence thereof, sent unto such cities of the Siculi as had the passages and were their confederates, the Centoripines, Halicyaeans, and others, not to suffer the enemy to go by, but to unite themselves and stop them, for that they would not so much as offer to pass any other way, seeing the Agrigentines had already denied them.

When the Sicilians were marching, the Siculi, as the Athenians had desired them, put themselves in ambush in three several places, and setting upon them unawares and on a sudden, slew about eight hundred of them, and all the ambassadors save only one, a Corinthian, which conducted the rest that escaped, being about fifteen hundred, to Syracuse.