History of the Peloponnesian War

The Thebans in Plataea had fared thus;

but the main body of the Thebans, who were to have come in full force while it was still night, on the chance that things might not go well with those who had entered the city, received while on the way news of what had happened and were now hastening to the rescue.

Now Plataea is about seventy stadia distant from Thebes, and the rain that had come on during the night delayed their coming; for the river Asopus was running high and was not easy to cross.