He sings to Hades and Persephone and all assembled there, entreating them to release his beloved from the realm of Death as follows:
As he sang these tender strains, the very ghosts shed tears. Tantalus, in spite of his thirst, stopped for a moment his efforts for water, Ixion’s wheel stood still, the vulture ceased to tear the giant’s liver, the daughters of Danaus rested from their task of drawing water in a sieve, and Sisyphus sat on his rock to listen. Then for the first time, it is said, the cheeks of the Furies were wet with tears. Proserpine could not resist, and Pluto himself gave way. Eurydice was called. She came from among the new-arrived ghosts, limping with her wounded foot. Orpheus was permitted to take her away with him on one condition, that he should not turn around to look at her till they should have reached the upper air. Under this condition they proceeded on their way, he leading, she following, through passages dark and steep, in total silence, till they had nearly reached the outlet into the cheerful upper world, when Orpheus, in a moment of forgetfulness, to assure himself that she was still following, cast a glance behind him, when instantly she was borne away. Stretching out their arms to embrace each other, they grasped only the air! Dying now a second time, she yet cannot reproach her husband, for how can she blame his impatience to behold her? “Farewell,” she said, “a last farewell,”- and was hurried away, so fast that the sound hardly reached his ears.
[Orpheus in Hades: OVID, Metamorphoses, Book X, 1-106]