The Eumenides of Aeschylus

In The Eumenides, Orestes is hunted down and tormented by the Furies, a trio of goddesses known to be the instruments of justice, who are also referred to as the "Gracious Ones" (Eumenides). They relentlessly pursue Orestes for the killing of his mother. However, through the intervention of Apollo, Orestes is able to escape them for a brief moment while they are asleep and head to Athens under the protection of Hermes.