An Estonian fairytale, this version is from Tales of The Amber Sea, compiled and translated by Irina Zheleznova in 1974.
One day a poor youth was walking along a road. Feeling tired he sat down on the grass by a large stone to rest and have a bite to eat. After he had eaten he stretched himelf out on the ground and fell asleep.
In his sleep he had a strange dream: he seemed to hear a squeaky little voice piping something in his ear. But the piping did not stop when he woke. By the sound of it he judged that it came from under the stone if not from somewhere within it.
The youth put his ear to the stone and found that that was where the piping was indeed coming from!