Genesis 26:35

And they were a grief of mind unto Isaac and to Rebekah.

Genesis 6:2

that the sons of God saw the daughters of men that they were fair; and they took them wives of all that they chose.

Genesis 27:46-2

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, of the daughters of the land, what good shall my life do me?

Genesis 28:8

And Esau saw that the daughters of Canaan pleased not Isaac his father.

Treasury of Scripture Knowledge

Summary

Which were a grief of mind unto Isaac and to Rebekah.

General references

Bible References

Which

Genesis 6:2
that the sons of God saw the daughters of men that they were fair; and they took them wives of all that they chose.
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, of the daughters of the land, what good shall my life do me?
Genesis 28:1
And Isaac called Jacob, and blessed him, and charged him, and said unto him, Thou shalt not take a wife of the daughters of Canaan.

General references

Genesis 34:9
And make ye marriages with us; give your daughters unto us, and take our daughters unto you.

American Standard Version Public Domain