Aeneid lines 6.236-81 (class translation)

These things having been done, (Aeneas) quickly performs the commands of the Sibyl. There was a cave, lofty and huge with a vast entrance, stony, protected by a black lake and the shadows of the woods, over which hardly any birds were able to hold their winged course safely: pouring out from the black throats, such exhalation bore itself to the vaulted heavens, whence the Greeks call the place by the name Avernus. Here first the priest stood four bullocks black in hide and pours wine on the forehead, and cutting the top hairs from between the horns he puts (them) in the sacred fires, first sacrifices, calling with his voice Hecate, powerful both in heaven and Erebus. Others put knives under (the throat) and catch the warm blood in bowls. Aeneas himself strikes with a sword a lamb with black fleece for the mother of the Eumenides and her great sister, and a sterile cow for you, Proserpina. Then he begins the nocturnal rites for the Stygian king and places the solid flesh of bulls in the fires, pouring rich oil over the burning entrails. But behold under the light of the first sun and its rising the ground began to bellow under their feet and the ridges of the forests began to move, and dogs were seen howling through the shade at the approach of the goddess. “Be away, far away, uninitiated ones, depart from the whole grove; and you enter on the path and take your sword from its sheath: now there is need for courage, now for a firm heart.” Having spoken so much she madly plunges herself into the open cave; that man hardly timidly matches his advancing guide in her steps.

Gods, who have power of the spirits, and the silent shades and Chaos and Phlegethon, the places widely quite at night, be it right for me to speak things heard, be it in your power to reveal things sunk in deep earth and fog.

The dim ones were going beneath the lonely night through the shade and through the empty homes of Dis and deserted kingdoms: there is a path of such a kind through the uncertain moon below the wicked light in the forests, where Jupiter hid the sky in a shadow, and the black night carried away the color from things. Grief and avenging Care placed their seats before the entrance itself in the first jaws of Orcus, and pale Diseases and sad Old Age inhabit, both Fear and ill-counseling Hunger and also ugly Need, terrible forms to see, both Death and Labor; then kindred Sleep of Death and evil Delight of the mind, and deadly war in the facing door, and the iron bedchambers of the Eumenides and mad Disagreement tied (in respect to) her snaky hair with bloody ribbons.