Who said "Hard work is for people who aren't naturally gifted."?

This quote is attributed to Nelson Muntz.

Hard work is for people who aren't naturally gifted. - Nelson Muntz

"Hard work is for people who aren't naturally gifted."

Nelson Muntz Work

"Ha-ha!"

"Your tears of unfathomable sadness!"

"I'm gonna enjoy this, Bart. I'm gonna enjoy this a lot."

"Eat my shorts, Simpson!"

"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."