History of the Peloponnesian War

In the mean time, Sitalces conferred with Perdiccas on the objects of his expedition; and since the Athenians had not joined him with their fleet, (not believing that he would come,) but had sent presents and envoys to him, he sent a part of his forces against the Chalcidians and Bottiaeans, and after shutting them up within their walls, laid waste their country.

While he was staying in these parts, the people towards the south, as the Thessalians, the Magnesians, with others who were subject to the Thessalians, and the Greeks as far as Thermopylae, were afraid that the army might advance against them, and were preparing [for such an event].