'Forty' in the Bible

Kenan lived after he became the father of Mahalalel eight hundred forty years, and became the father of sons and daughters

In seven days, I will cause it to rain on the earth for forty days and forty nights. Every living thing that I have made, I will destroy from the surface of the ground."

The rain was on the earth forty days and forty nights.

The flood was forty days on the earth. The waters increased, and lifted up the ship, and it was lifted up above the earth.

It happened at the end of forty days, that Noah opened the window of the ship which he had made,

He spoke to him yet again, and said, "What if there are forty found there?" He said, "I will not do it for the forty's sake."

Isaac was forty years old when he took Rebekah, the daughter of Bethuel the Syrian of Paddan Aram, the sister of Laban the Syrian, to be his wife.

When Esau was forty years old, he took as wife Judith, the daughter of Beeri the Hittite, and Basemath, the daughter of Elon the Hittite.

thirty milk camels and their colts, forty cows, ten bulls, twenty female donkeys and ten foals.

Forty days were fulfilled for him, for that is how many the days it takes to embalm. The Egyptians wept for him for seventy days.