17 The flood was forty days on the earth. The waters increased, and lifted up the ship, and it was lifted up above the earth.
Genesis 7:17 Cross References - WEB
Genesis 7:4
4 In seven days, I will cause it to rain on the earth for forty days and forty nights. I will destroy every living thing that I have made from the surface of the ground.”
Genesis 7:12
12 It rained on the earth forty days and forty nights.