he princess then led him to the spot where the harmonious tree was planted; and there the emperor heard a concert, different from all he had ever heard before; and stopping to see where the musicians were, he could discern nobody far or near, but still distinctly heard the music which ravished his senses. “My daughter,” said he to the princess, “where are the musicians whom I hear? Are they under ground, or invisible in the air? Such excellent performers will hazard nothing by being seen; on the contrary, they would please the more.” “Sir,”answered the princess, smiling, “they are not musicians, but the leaves of the tree your majesty sees before you, which form this concert; and if you will give yourself the trouble to go a little nearer, you will be convinced, and the voices will be the more distinct.”

Excerpt from “The Talking Bird”
The Arabian Nights – Their Best-Known Tales