The Furies

Born either from Nyx or from the blood of Uranus, the Furies (Erinyes in Greek) punish the wrongdoings of both men and gods.  When Orestes commits matricide, it is the Furies who mercilessly pursue him.  Zeus was not able to command them to stop, but they did abide by his will nonetheless. 

Source(s):

  1. HesiodTheogeny.

  2. AeschylusOresteia.