they went along, and passed the Ocean stream, and the White Rock, and passed the gates of Helios the Sun, and the country of dreams, and presently arrived in the meadow of asphodel. This is the dwelling place of souls, images of dead men.
This passage establishes the meadow of asphodel as the canonical Homeric topos of the underworld, explicitly glossed as the collective habitation of disembodied souls reduced to images.
, Odyssey of Homer, 2009thesis