Falling to the River and Flowing

One day Nashruddin cleanses with wudhu on a river side. After finishing the wudhu and when he is about to wear his shoes, suddenly one of his shoes falls to the river and flows away with the river current. In an instance Nashruddin turns his body to face the river and angrily he says, "Hei River, take back this wudhu water and give me back my shoe."