Apollo and the Cumean Sibyl

The subject comes from Ovid's Metamorphoses, 14: 130-153 and tells how the Sibyl of Cumae, was loved by Apollo. He bribed her by offering to prolong her life for as many years as there were grains in a heap of dust, in return for her embraces. She refused him and although he kept his word, he denied her perpetual youth, so she was condemned to centuries as a wizened crone.