History of the Peloponnesian War

Now those that were besieged with Cylon were for want of both victual and water in very evil estate, and therefore Cylon and a brother of his fled privily out;

but the rest, when they were pressed and some of them dead with famine, sat down as suppliants by the altar that is in the citadel. And the Athenians, to whose charge was committed the guard of the place, raising them upon promise to do them no harm, put them all to the sword. Also they had put to death some of those that had taken sanctuary at the altars of the severe goddesses as they were going away. And from this the Athenians, both themselves and their posterity, were called accursed and sacrilegious persons.

Hereupon the Athenians banished those that were under the curse; and Cleomenes, a Lacedaemonian, together with the Athenians in a sedition, banished them afterwards again, and not only so but disinterred and cast forth the bodies of such of them as were dead. Nevertheless there returned of them afterwards again, and there are of their race in the city unto this day.