King Crimson "The Letters"

With quill and silver knife
She carved a poison pen
Wrote to her lover's wife :

"Your husband's seed has fed my flesh"

As if a leper's face
That tainted letter graced
The wife with choke-stone throat
Ran to the day with tear-blind eyes

Impaled on nails of ice
And raked with emerald fire
The wife with soul of snow
With steady hands begins to write :

"I'm still, I need no life
To serve on boys and men
What's mine was yours is dead
I take my leave of mortal flesh"

King Crimson - Letters 
Album Islands - 1971