History of the Peloponnesian War

Those in Ithome, when they could no longer hold out, in the tenth year of the siege rendered the place to the Lacedaemonians upon condition of security to depart out of Peloponnesus and that they should no more return, and whosoever should be taken returning to be the slave of him that should take him.

For the Lacedaemonians had before been warned by a certain answer of the Pythian oracle to let go the suppliant of Jupiter Ithometes.