History of the Peloponnesian War

and that we tell the Segestans in particular, that since they went to war with the Selinuntines in the first instance without consulting the Athenians, they may also make peace with them by themselves: and that we do not in future make alliance, as we have been accustomed, with men whom we shall assist when they are unfortunate, and when we ask assistance ourselves, shall not obtain it.