Once upon a time, In a village lived a washerman, who had a donkey, What ever he earned was spent on his family. He was left with no money to feed the donkey and so, he used to leave him out in the pastures. The donkey was very thin due to lack of proper food.
One day the washerman found a lion's skin in the jungle. He got an Idea and brought the skin home. That night, he covered the donkey with the lion's skin and left him in the fields so that his donkey could eat to his heart's content.
One night, by mistake, the lions skin fell off the donkey, and the watchman found out that is was a donkey instead of a lion. He beat the donkey badly. Later, he found out the donkey's owner, and threw the washerman out of the village.
Thus, the washerman was punished for fooling other people.