This German folktale tells the story of a poor farmer who finds an ear of corn in his field. He is amazed to find that the ear of corn is filled with rubies, diamonds, and other precious stones. The farmer takes the ear of corn to the king, who is so
From Wikipedia
"The Ear of Corn" is a German fairy tale collected by the Brothers Grimm, number 194. It is Aarne-Thompson type 779, Divine Rewards and Punishments.