Who said "The end of all things has come."?

This quote is attributed to Thanos.

The end of all things has come. - Thanos

"The end of all things has come."

Thanos Death

"I am inevitable."

"The hardest choices require the strongest wills."

"Perfectly balanced, as all things should be."

"You should have aimed for the head."

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."