Who said "The Ring cannot be destroyed. Neither can I."?

This quote is attributed to Sauron.

The Ring cannot be destroyed. Neither can I. - Sauron

"The Ring cannot be destroyed. Neither can I."

Sauron

"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."