Genesis 26:35

which were disobedient unto Isaac and Rebekah.

Genesis 6:2

the sons of God saw the daughters of men that they were fair, and took unto them wives, which they best liked among them all.

Genesis 27:46-2

And Rebekah spake to Isaac, "I am weary of my life, for fear of the daughters of Heth. If Jacob take a wife of the daughters of Heth, such one as these are, or of the daughters of the land, what lust should I have to live?"

Genesis 28:8

and seeing also 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
the sons of God saw the daughters of men that they were fair, and took unto them wives, which they best liked among them all.
Genesis 27:46
And Rebekah spake to Isaac, "I am weary of my life, for fear of the daughters of Heth. If Jacob take a wife of the daughters of Heth, such one as these are, or of the daughters of the land, what lust should I have to live?"
Genesis 28:1
Then Isaac called Jacob his son and blessed him, and charged him and said unto him, "See thou take not a wife of the daughters of Canaan,

General references

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