 The "Theogony" text is ambiguous about whether Prometheus was freed or remained chained to the rock, but lines 615-616 are usually interpreted as indicating that he remained bound.The story gives a mythological explanation (etiology) of the practice of sacrificing only the bones to the gods, while humans get to keep the edible meat and fat.It is also the first sacrifice to the gods, and sets the precedent for humans establishing or renewing a covenant with sacrifice.