History of the Peloponnesian War
Thucydides
Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.
The Athenians charged and assaulted the wall, but being annoyed with missiles by a large body from the hill, which was steep, (for those on the heights more easily reached their aim,) and not being able to force a passage, they retreated again, and rested.
There happened also to be at the same time some claps of thunder and rain, as is generally the case when the year is now verging on autumn; in consequence of which the Athenians were still more dispirited, and thought that all these things also were conspiring together for their ruin.