The Orphic Hymns are a collection of 87 hymns in ancient Greek, addressed to various deities.
Attributed in antiquity to the mythical poet Orpheus, they were composed in Asia Minor, most likely around the 2nd or 3rd centuries AD, and seem to have belonged to a cult community which used them in ritual. The collection is preceded by a proem in which Orpheus addresses the legendary poet Musaeus.
https://en.wikipedia.org/wiki/Orphic_Hymns
Greek Mythology in Literature at PG:
https://www.gutenberg.org/ebooks/subject/17235