Cross References → Genesis 26:34

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

When Esau was forty years old, he took as his wives

Genesis 36:2,5,13
Esau took his wives from the daughters of Canaan: Adah daughter of Elon the Hittite, Oholibamah daughter of Anah and granddaughter of Zibeon the Hivite, ... and Oholibamah gave birth to Jeush, Jalam, and Korah. These were the sons of Esau, who were born to him in the land of Canaan. ... These are the sons of Reuel: Nahath, Zerah, Shammah, and Mizzah. They are the grandsons of Esau’s wife Basemath.

Judith daughter of Beeri the Hittite

Genesis 24:3
and I will have you swear by the LORD, the God of heaven and the God of earth, that you will not take a wife for my son from the daughters of the Canaanites among whom I am dwelling,
Exodus 34:16
And when you take some of their daughters as brides for your sons, their daughters will prostitute themselves to their gods and cause your sons to do the same.
1 Corinthians 7:2
But because there is so much sexual immorality, each man should have his own wife, and each woman her own husband.
Hebrews 12:16
See to it that no one is sexually immoral, or is godless like Esau, who for a single meal sold his birthright.

Basemath

Genesis 36:2
Esau took his wives from the daughters of Canaan: Adah daughter of Elon the Hittite, Oholibamah daughter of Anah and granddaughter of Zibeon the Hivite,