And I don't know where the idea originated, that I was taught: that God rested from His work of Creation, except for the creation of each new, individual human soul --- although it IS stated that God did rest from all His work of creation.
Douay-Rheims BibleAs far the water that inundated the world in the Noah Flood: the Bible does not say it was created on the spot: it says it both rained down from the clouds, and upwelled from "the fountains of the deep" being opened.
Genesis 2:2"And on the seventh day God ended his work which he had made: and he rested on the seventh day from all his work which he had done."
It's only fairly recently been discovered that there is more water beneath the earth's crust, than above it. That discovery suggests the water could have emerged mostly from "the Deep" --- beneath the earth's crust, probably at some of its thinnest spots, which would be on the ocean floor in the abyssal deeps and trenches --- and, arguably, returned there due to massive crustal subductions.
But like I said, I don't know!
Maybe not on the spot, but Noe was only given seven days notice.
[4] For yet a while, and after seven days, I will rain upon the earth forty days and forty nights; and I will destroy every substance that I have made, from the face of the earth. Genesis, Chapter 7.
[12] And the rain fell upon the earth forty days and forty nights.
I find it hard to believe the earth's atmosphere could hold enough moisture to shower the entire earth with rain for forty days, without violating the conservation of mass and energy.
And then there's this:
[24] And the waters prevailed upon the earth a hundred and fifty days.
The earth took only seven days to flood, but 150 days to dry out?
[2] And the Lord appeared to him in a flame of fire out of the midst of a bush: and he saw that the bush was on fire and was not burnt. Exodus, Chapter 3.