One day a clever fox was passing by the side of a vineyard to the forest. Suddenly he saw bunches of ripe grapes hanging high on the vines. His mouth watered to eat it.

The fox could not climb up the tree. At first he stretched out his head to reach the grapes. But he found them rather too high. So he jumped to get it. Even then he could not reach it. He jumped again and again till he was completely tired.

At last the tired fox gave up and left the place for the forest. He said, "The grapes are sour. Who wants sour grapes?”