Standing on the shoulders of giants

I believe the phrase something like "we stand on the shoulders of giants" is a part of a longer phrase or quotation. The meaning is clear: we, in the present generation, see further because we have benefitted from the efforts of those of previous generations. But what is the correct phrase, what quotation does it come from, who said it? Thanks.

It's originally a quote from Isaac Newton. He said something to the effect of "If I have seen further, it
is only because I have stood on the shoulders of giants"