Who said "Your work is temporary; my work is eternal."?

This quote is attributed to The Night King.

Your work is temporary; my work is eternal. - The Night King

"Your work is temporary; my work is eternal."

The Night King Work

"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."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."