Who said "I have forged an army that knows no mercy, no weakness."?

This quote is attributed to Sauron.

I have forged an army that knows no mercy, no weakness. - Sauron

"I have forged an army that knows no mercy, no weakness."

Sauron Work

"One does not simply walk into Mordor without purpose and absolute will."

"The Ring is mine. All that exists serves the master of the Ring."

"I am eternal. I am inevitable. I am the darkness that devours all light."

"Those who resist my rule shall know despair beyond measure."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."