It's found in the second section, "A Game of Chess", within the lines:
> I saw with my own eyes the Sibyl of Cumae hanging in a jar, and when the boys said, Sibyl, what do you want? she replied I want to die.
> The fever of bone
>
> Let the wind speak.
This line evokes a sense of decay and yearning for death. It's a stark image that helps to convey the barrenness and spiritual emptiness of the modern world, a theme central to "The Waste Land".