Who said "The darkness is patient; it has all the time in the world."?

This quote is attributed to The Night King.

The darkness is patient; it has all the time in the world. - The Night King

"The darkness is patient; it has all the time in the world."

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."