A farmer had five sons. They were all lazy. The farmer wanted to see them as hard-working young men. He was worried about their future. One day he fell ill. He was on his death-bed. He called his sons. He told them that there was a treasure hidden in his fields. He passed away the same day.
The sons went to the fields. They dug up every inch of the fields. They did not find the hidden treasure. After a few days, it rained heavily. Someone advised them to sow seeds in the fields. They did the same. They got a good crop. They became rich. Now they understood the value of hard work. They got the hidden treasure from the fields in the form of good crops.
Moral: No pains no gains or work is its own reward.