This was (to the best of my knowledge) a comment that Jefferson made to Madison, and I believe he was referring to revolutions, not civil wars. Jefferson was at the time strongly under the influence of the French Revolution, which he thought was a marvelous thing. Madison pushed back on Jefferson, and he recanted from the position. I regret that I can't provide a solid source, but I believe I read this anecodote in Jack Rakove's "Revolutionaries".
It is also possible that you're referring to Jefferson's quote "God forbid we should ever be 20. years without such a rebellion.", which I think in context is a bit more ambiguous.
I recall no evidence that the other founding fathers shared Jefferson's belief.