I think that what Paulie says is "sfortunato," literally, "unfortune." I could be wrong, though. You might try checking a Godfather script, which can be found all over the internet (most notably, at www.jgeoff.com/godfather).
"Don Corleone, I am honored and grateful that you have invited me to your daughter... 's wedding... on the day of your daughter's wedding. And I hope their first child be a masculine child. I pledge my ever-ending loyalty."
