History of the Peloponnesian War

This oath they shall on both sides every year renew and shall erect pillars [inscribed with this peace] at Olympia, Pythia, and in the Isthmus; at Athens, within the citadel; and at Lacedaemon, in the Amyclaeum.

"And if anything be on either side forgotten, or shall be thought fit upon good deliberation to be changed, it shall be lawful for them to do it, in such manner as the Lacedaemonians and Athenians shall think fit, jointly.