Genesis 7:12

For yet seven days, and I will cause it to rain upon the earth forty days and forty nights; and every living substance that I have made will I destroy from off the face of the earth.

And the flood was forty days upon the earth; and the waters increased, and bare up the ark, and it was lift up above the earth.

And when he had fasted forty days and forty nights, he was afterward an hungred.

And I stayed in the mount, according to the first time, forty days and forty nights; and the LORD hearkened unto me at that time also, and the LORD would not destroy thee.

And he arose, and did eat and drink, and went in the strength of that meat forty days and forty nights unto Horeb the mount of God.

When I was gone up into the mount to receive the tables of stone, even the tables of the covenant which the LORD made with you, then I abode in the mount forty days and forty nights, I neither did eat...

And I fell down before the LORD, as at the first, forty days and forty nights: I did neither eat bread, nor drink water, because of all your sins which ye sinned, in doing wickedly in the sight of the...

And Moses went into the midst of the cloud, and gat him up into the mount: and Moses was in the mount forty days and forty nights.