Genesis 7:12 (KJV)

Noah, and his family and the living creatures, enter the ark, and the flood beginsThe call to Noah is very kind, like that of a tender father to his children to come in-doors when he sees night or a storm coming. Noah did not go into the...

Genesis 7:4 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.
Genesis 7:17 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.
Exodus 24:18 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.
Deuteronomy 9:9 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 bread nor drink water:
Deuteronomy 9:18 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 LORD, to provoke him to anger.
Deuteronomy 10:10 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.
1 Kings 19:8 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.
Matthew 4:2 And when he had fasted forty days and forty nights, he was afterward an hungred.

From OpenBible.info, most relevant first.

And the rain וַיְהִי wayhî Verb · qal sequential imperfect, third person masculine singular · with and הַגֶּשֶׁם haggešem גֶּשֶׁם Noun · masculine singular · with the
was upon the earth עַל ʿal Preposition הָאָרֶץ hāʾāreṣ אֶרֶץ Noun · masculine or feminine singular · with the
forty אַרְבָּעִים ʾarbāʿîm אַרְבָּעִים Number · masculine or feminine plural
days יוֹם yôm יוֹם Noun · masculine singular
and forty וְאַרְבָּעִים wĕʾarbāʿîm אַרְבָּעִים Number · masculine or feminine plural · with and
nights לָיְלָה lāyĕlâ לַיִל Noun · masculine singular

Genesis 7:12 KJV