Here is the original use.
And a reminder from the current Amazing Spider-Man writer.
I give bonus points to anyone who knows it's
"With great power must also come great responsibility."
Yep. "Must also" is in the original.
— Dan Slott (@DanSlott) October 12, 2015
But not according to Marvel lawyers and merchandise. Who have just registered a trademark for the phrase “With Great Power Comes Great Responsibility” for “Shirts, tops, underwear and skirts.”
Tut tut tut. To stop this kind of thing I guess, but even so…