Who said "Never go in against a Sicilian when death is on the line!"?

This quote is attributed to Vizzini.

Never go in against a Sicilian when death is on the line! - Vizzini

"Never go in against a Sicilian when death is on the line!"

Vizzini Wisdom

Character in The Princess Bride

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"Inconceivable!"

"Fezzik, are there rocks ahead? If there are, we'll all be dead."

"The cliffs of Insanity!"

"I am not being paid to make him happy."

"I'm not angry, I'm just disappointed."

"The best things in life are free."

"You can't have everything in life, but you can have what matters most."

"A woman's intuition is rarely wrong."