E. M. Berens, Myths and Legends of Ancient Greece and Rome
“ Another example of the manner in which the gods punished presumption and vanity is seen in the story of the daughters of King Pierus. Proud of the perfection to which they had brought their skill in music, they presumed to challenge the Muses themselves in the art over which they specially presided. The contest took place on Mount Helicon, and it is said that when the mortal maidens commenced their song, the sky became dark and misty, whereas when the Muses raised their heavenly voices, all nature seemed to rejoice, and Mount Helicon itself moved with exultation. ”
