Aesop's Fables (1884)
82. The Wolf and the Horse.
A Wolf coming out of a field of oats met with a Horse, and thus addressed him: "I would advise you to go into that field. It is full of capital oats, which I have left untouched for you, as you are a friend the very sound of whose teeth it will be a pleasure to me to hear." The Horse replied: "If oats had been the food for wolves, you would never have indulged your ears at the cost of your belly."
Men of evil reputation, when they perform a good deed, fail to get credit for it.
Aesop's Fables: A New Revised Version From Original Sources (translator not identified), 1884 . Illustrations by Ernest Henry Griset (1844-1907), John Tenniel (1820-1914) and Harrison Weir (1824-1906). Available online at Project Gutenberg.