Who said "I've worked too hard to let this slip away from me."?

This quote is attributed to Sonny Corleone.

I've worked too hard to let this slip away from me. - Sonny Corleone

"I've worked too hard to let this slip away from me."

Sonny Corleone Perseverance

"Go to the mattresses. That's what we do when there's a war."

"I'm gonna make him an offer he can't refuse."

"A man who doesn't spend time with his family can never be a real man."

"It's not personal, it's just business."

"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."