Who said "You cannot kill what is already dead."?

This quote is attributed to Hela.

You cannot kill what is already dead. - Hela

"You cannot kill what is already dead."

Hela Death

"I am Hela, goddess of death. Kneel before me."

"Everything you know will fall to ruin."

"I've spent millennia in that prison, and now I'm free."

"You cannot fight your own destiny."

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."