'Forty Days' in the Bible

For in seven more days I will cause it to rain upon the earth forty days and forty nights. And I will destroy from off the face of the earth every living thing that I have made.

And the rain was upon the earth forty days and forty nights.

And the flood was upon the earth forty days. And the waters increased and bore up the ark, and it was lifted up above the earth.

And it happened, at the end of forty days Noah opened the window of the ark which he had made.

And forty days were fulfilled for him, for so are fulfilled the days of those who are embalmed. And the Egyptians mourned for him seventy days.