The Godfather (1972)
"I'm gonna make him an offer he can't refuse" (#2, The Godfather (1972)) and "Keep your friends close, but your enemies closer" (#58, The Godfather Part II (1974))
Which of these 4 pairs of quotes is the most classic, in your opinion?
Interestingly, the only case where the sequel's quote is ranked higher than the original's.