Alcestis by Euripides

Apollo desired of the Fates that Admetus, who was about to die, might give a substitute to die for him, that so he might live for a term equal to his former life; and Alcestis, his wife, gave herself up, while neither of his parents were willing to die instead of their son. But not long after the time when this calamity happened, Hercules having arrived, and having learned from a servant what had befallen Alcestis, went to her tomb, and having made Death retire, covers the lady with a robe; and requested Admetus to receive her and keep her for him; and said he had borne her off as a prize in wrestling; but when he would not, he unveiled her, and discovered her whom he was lamenting.