'Forty Days' in the Bible

For in yet seven days I will cause it to rain on the earth forty days and forty nights; and every living being which I have made will I destroy from the ground.

And the pour of rain was on the earth forty days and forty nights.

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

And it came to pass at the end of forty days that 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.