Donkey

a man bought a donkey and was going home.
Three robbers planned to rob the donkey.
One took away the donkey and the other tied the rope of donkey to his own neck.
When man arrived home, he surprised that how a donkey turned into human.
The man asked how come this happen?
The robber replied that I disobeyed my parents then I become donkey.
He released and adviced to not do it again.
The next day when the man went to bazar to buy an other donkey. he saw his first donkey and went to it and whispered in his ear that I think again you disobeyed your parent so you turned into donkey