Other version:
"The good Lord made us man and woman, but Smith and Wesson made us equal”
While on the subject of S&W...equality doesn't always apply:
"A Smith and Wesson always beats 4 aces”
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Movie 'Sudden Impact' with Clint Eastwood to armed robber:
Harry Callahan: Well, we're not just gonna let you walk out of here.
Crook: Who'se we sucka?
Harry Callahan: [slowly drawing his .44 Magnum] Smith and Wesson... and me.
It would probably work against 4 spades as well.