The Fox and the Crow

Aesop's Fables

A CROW having stolen a bit of meat, perched in a tree and held it in her beak. A Fox, seeing this, longed to possess the meat himself, and by a wily stratagem succeeded. "How handsome is the Crow," he exclaimed, in the beauty of her shape and in the fairness of her complexion! Oh, if her voice were only equal to her beauty, she would deservedly be considered the Queen of Birds!" This he said deceitfully; but the Crow, anxious to refute the reflection cast upon her voice, set up a loud caw and dropped the flesh. The Fox quickly picked it up, and thus addressed the Crow: "My good Crow, your voice is right enough, but your wit is wanting."

Or the moral, as it runs in the french:

Mon bon Monsieur,
Apprenez que tout flatteur
Vit aux dépens de celui qui l'écoute :
Cette leçon vaut bien un fromage, sans doute.

My clumsy translation: all flatterers live off of those who pay them heed.
In the version i learned it was cheese, not meat.

Maître Corbeau, sur un arbre perché,
Tenait en son bec un fromage.
Maître Renard, par l'odeur alléché,
Lui tint à peu près ce langage:
"Hé! bonjour, Monsieur du Corbeau.
Que vous êtes joli! que vous me semblez beau!
Sans mentir, si votre ramage
Se rapporte à votre plumage,
Vous êtes le Phénix des hôtes de ces bois."
A ces mots le Corbeau ne se sent pas de joie;
Et pour montrer sa belle voix,
Il ouvre un large bec, laisse tomber sa proie.
Le Renard s'en saisit, et dit: "Mon bon Monsieur,
Apprenez que tout flatteur
Vit aux dépens de celui qui l'écoute:
Cette leçon vaut bien un fromage, sans doute."
Le Corbeau, honteux et confus,
Jura, mais un peu tard, qu'on ne l'y prendrait plus.

- Jean De La Fontaine's adaptation of Aesop's fable, as quoted by ideath above.