Aesop's Fables
#68 The Crow and the Serpent
A Crow in great want of food saw a Serpent asleep in a sunny nook, and flying down, greedily seized him.
The Serpent, turning about, bit the Crow with a mortal wound.
In the agony of death, the bird exclaimed: "O unhappy me! who have found in that which I deemed a happy windfall the source of my destruction."