One king asked his people to make a pond once. After the completion of the pond, the state announced that every day that everyone should take a glass of milk from their home and pour it into the pond. The king would like to see the pool of milk from the porch of his palace in the morning. The king's order was passed to all. One man thought that everyone would take milk in glass, if he came in a dark place in the darkness of the night with a glass of water in the pond, nobody would understand it. So he went with everyone and unveiled a glass of water to everyone. 
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In the morning the king came to the verandah of his palace and cried wailing. His pond was filled with water, there was not even a drop of milk.
Actually everyone thought that I did not need to take milk and others would pour milk on the pond.
Credit: Soibal Saha