A literary example of a fable is the classic children's story "The Tortoise and the Hare." A tale is a fable if it centers on a moral lesson, and they often have animals as protagonists. In "The Tortoise and the Hare," the lesson is slow and steady wins the race.
Perhaps the most well-known author of fables is Aesop, who is credited with writing "The Tortoise and the Hare." Other traditional fables accredited to Aesop include "The Lion and the Mouse," "The Shepherd Boy and the Wolf," "The Dog and His Reflection," and "The Town Mouse and the Country Mouse."