E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
When Pericles, Tyrant of Athens, was on his death-bed, he overheard his friends recounting his various merits, and told them they had omitted the greatest of all, that no Athenian through his whole administration had put on mourning through his severityi.e. he had caused no Athenian to be put to death arbitrarily.