Who said "Gratitude is owed to me, not by me."?

This quote is attributed to Dormammu.

Gratitude is owed to me, not by me. - Dormammu

"Gratitude is owed to me, not by me."

Dormammu Gratitude

"I am eternal. I am infinite. I am Dormammu."

"Your world is but a grain of sand in the vast desert of my domain."

"Time is a construct I have transcended. Your mortality is your weakness."

"Surrender to me, and perhaps I shall make your end swift."

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"