Genesis 6:2 That the sons of God saw the daughters of men that they were fair; and they took them wives of all which they chose.

Genesis 26:34 ¶And Esau was forty years old when he took to wife Judith the daughter of Beeri the Hittite, and Bashemath the daughter of Elon the Hittite:

Genesis 26:35 Which were a grief of mind unto Isaac and to Rebekah.

Genesis 27:46 And Rebekah said to Isaac, I am weary of my life because of the daughters of Heth: if Jacob take a wife of the daughters of Heth, such as these which are of the daughters of the land, what good shall my life do me?

Deuteronomy 7:3 Neither shalt thou make marriages with them; thy daughter thou shalt not give unto his son, nor his daughter shalt thou take unto thy son.