One day, Haroun Al Raschid read
A book wherein the poet said:--

"Where are the kings, and where the rest
Of those who once the world possessed?

"They're gone with all their pomp and show,
They're gone the way that thou shalt go.

"O thou who choosest for thy share
The world, and what the world calls fair,

"Take all that it can give or lend,
But know that death is at the end!"

Haroun Al Raschid bowed his head:
Tears fell upon the page he read.

Henry Wadsworth Longfellow

http://www.poemhunter.com/poem/haroun-al-raschid/