History of the Peloponnesian War

And when, after all was in readiness, they were on the point of sailing away, the moon was eclipsed; for it happened to be at the full. The greater part therefore of the Athenians urged the generals to stop, regarding the matter with religious scruple; and Nicias (for he was somewhat over addicted to superstition, and such feelings,) declared that he would not now so much as consider the matter, with a view to moving, until, as the soothsayers directed, he had waited thrice nine days. And so the Athenians, having been stopped on this account, remained in the country.

When the Syracusans, too, heard this, they were much more stimulated not to relax in their efforts against the Athenians, since they themselves had now confessed that they were no longer their superiors, either by sea or by land, (for they would not else have meditated sailing away;) and at the same time, because they did not wish them to go and settle in any other part of Sicily, and so to be more difficult to make war upon;