Goldilocks and the Three Bears.

Goldilocks and the Three Bears [wiki] is a notable children’s bedtime story. Often considered an anonymous folk story, even one of the stories collected by the Brothers Grimm, it actually first saw print in 1837 as a prose story composed by the poet Robert Southey and collected in his book The Doctor. Possibly based on an even older story (though this is by no means certain), the story became widely known after being published by Southey, and was so often retold, that it has lost connection to its author.

Found here.