Frog queen

The sons bowed to their father and went to tell their wives. But when Prince Ivan arrived home he sat down looking very miserable. The frog was jumping around on the floor, and it asked him:
"You look very unhappy, Prince Ivan ? Are you in trouble?"
"My father has ordered you to make him a shirt by tomorrow," the prince answered.
"Do not worry, Prince Ivan," the frog said. "You just go to bed. You will feel better after a good sleep."