Who said "Don't quit when things get tough."?

This quote is attributed to Lightning McQueen.

Don't quit when things get tough. - Lightning McQueen

"Don't quit when things get tough."

Lightning McQueen Perseverance

"I'm Lightning McQueen. I'm a race car."

"Ka-chow!"

"I'm not just a race car, I'm a Lightning McQueen."

"Life is a journey, not just a race to the finish line."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."