Who said "I'll keep fighting until I can't stand anymore!"?

This quote is attributed to Luffy.

I'll keep fighting until I can't stand anymore! - Luffy

"I'll keep fighting until I can't stand anymore!"

Luffy Perseverance

"I'm gonna be King of the Pirates!"

"A man's dream will never die!"

"I don't care what happens to me, I'm gonna help my friend!"

"Being alone is better than being with the wrong people."

"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."