As he spoke and touched the strings of his lyre, the bloodless spirits wept. Tantalus no longer caught at the retreating water; the wheel of Ixion stood still in amazement; the birds ceased to tear at the liver of Tityus, and the granddaughters of Belus paused at their urns. Thou, too, Sisyphus, didst seat thyself on the stone. The story is that then for the first time the cheeks of the Eumenides, overcome by the music of Orpheus, were wet with tears; nor could the royal consort, nor he who ruled the infernal regions endure to deny his request. And they called for Eurydice. She advanced at a slow pace from among the shades newly arrived, for she was lame from her wound.
The RhodOpeian hero received her and at the same time was told the condition that he turn not back his eyes until he had passed the Avernian Valley, lest the grant be revoked. They ascended the path in silence, steep, dark, and enveloped in deepening gloom. Now they were arrived at last at a point not far below the verge of the upper earth. Orpheus, fearing lest Eurydice should fall, and impatient to behold her once again, turned his eyes, and at once she sank back again. Hapless woman, stretching out her hands and struggling for the arms of her lover, she caught nothing but empty air. Dying a second time, she complained not of her husband, for why should she complain of being beloved? Then she pronounced the last farewell, which he scarcely heard, and again was she hurried back whence she had come.
And Orpheus was astounded and perplexed by this two-fold death of his wife.
The story above has been copied from tourhints.info. You can read the rest of the story on link Orpheus and Eurydice.