Phaedrus,
The Fables of Phædrus
“ Fable XXVII. THE SHEEP AND THE CROW.A Crow, sitting at her ease upon a Sheep’s back, pecked her with her beak. After she had done this for a long time, the Sheep, so patient under injury, remarked: “If you had offered this affront to the Dog, you could not have endured his barking.” But the Crow thus answered the Sheep: “I never sit on the neck of one so strong, as I know whom I may provoke; my years having taught me cunning, I am civil to the robust, but insolent to the defenceless. Of such a nature have the Gods thought fit to create me.” ”
