What do you consider “the river count” in Genesis?
I’ll step lightly because I don’t read Hebrew, but Genesis says a river flowed out of Eden to water the garden and from there divided into four streams.
One garden. Five rivers. Then it gets tricky. Since I can’t read the original text, I have to punt, but I gather that at least some scholars argue that directionality is not definitive in ancient Hebrew, so what we translate as flowing in vs. flowing out, or upstream vs. downstream, is open. I dunno.
But start with the five rivers. We have the Tigris and Euphrates, uniting to form the lower Euphrates. That’s three. Now find two more.
7,000 years ago, maybe that was obvious on the ground.
That would be 42, of course.