Genesis 7:17

7:17 The flood engulfed the earth for forty days. As the waters increased, they lifted the ark and raised it above the earth.

Genesis 25:20

25:20 When Isaac was forty years old, he married Rebekah, the daughter of Bethuel the Aramean from Paddan Aram and sister of Laban the Aramean.

Genesis 26:34

26:34 When Esau was forty years old, he married Judith the daughter of Beeri the Hittite, as well as Basemath the daughter of Elon the Hittite.