Who said "I am patient, for eternity is my domain."?

This quote is attributed to The Night King.

I am patient, for eternity is my domain. - The Night King

"I am patient, for eternity is my domain."

The Night King Patience

"The living are not my concern."

"Death is the enemy. And we are joining the fight against it."

"Winter came for House Umber."

"I am the night."

"Patience is a virtue I'm still learning."

"I may be a redhead, but I'm not a hothead."

"Patience is a virtue."

"Patience is a virtue I never learned."