The Snake-Prince Sleepy-Head
The Snake-Prince Sleepy-Head is an Iranian folktale published by Emily Lorimer and David Lockhart Robertson Lorimer in their collection Persian Tales, in 1919. It is related to the international cycle of the Animal as Bridegroom or The Search for the Lost Husband, in that a human princess marries a supernatural husband or man in animal form, loses him and has to seek him out.
Source: Wikipedia — The Snake-Prince Sleepy-Head (CC BY-SA 4.0)