Who said "Death is a mercy I dispense to those who have served well."?

This quote is attributed to Sauron.

Death is a mercy I dispense to those who have served well. - Sauron

"Death is a mercy I dispense to those who have served well."

Sauron Death

"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."

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."