Death
Where are the bright ones, the handsome-looking ones, and where are those who took pride in their youthfulness, where have they gone? Where are the great kings who built cities and castles and fortified them with towering walls? What happened to the lionhearted valorous ones who made their enemy suffer humiliation in the battlefields? Time waned under their feet and they ended inside dark graves. Think of it and take heed- Abu Bakr (RA) from 'Beauty of the Righteous'