Musannaf Ibn Abi Shaybah

Hazrat Mustawrid, who belonged to Banu Fihr, says: I heard the Messenger of Allah (peace be upon him) say: By Allah, the example of this world in comparison to the Hereafter is like that of one of you dipping his finger into the river and then taking it out; then let him see how much (water) adheres to his finger (so the amount of water that remains on the finger compared to the river is the same as the status of this world compared to the Hereafter).