Who said "You should fear not just death, but what comes before it."?

This quote is attributed to Smaug.

You should fear not just death, but what comes before it. - Smaug

"You should fear not just death, but what comes before it."

Smaug Fear

"I am fire. I am death."

"You have no idea what you're dealing with."

"I am armored above and below with iron scales and hard gems."

"My armor is like tenfold shields, my teeth are swords, my claws spears."

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."