Clelia
In 507 BC, as a pledge of peace, King Porsenna had some young girls delivered by the Romans.
One night, one of these, called Clelia, at the head of some of her companions, manages to escape. The girls swim across the Tiber and return to Rome. But the Roman citizens, instead of welcoming them with joy, accompany them back to the Etruscan camp saying: “The given word is sacred.”