Genesis 26:35

who were a grief of spirit to Isaac and to Rebekah.

Genesis 6:2

the sons of God saw the daughters of men, that they were good. And they took wives for themselves from all whom 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 takes a wife of the daughters of Heth, like these of the daughters of the land, what good is my life to me?

Genesis 28:8

and when Esau saw that the daughters of Canaan did not please 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 good. And they took wives for themselves from all whom they chose.
Genesis 27:46
And Rebekah said to Isaac, I am weary of my life because of the daughters of Heth. If Jacob takes a wife of the daughters of Heth, like these of the daughters of the land, what good is my life to me?
Genesis 28:1
And Isaac called Jacob, and blessed him, and commanded him. And he said to him, You shall not take a wife of the daughters of Canaan.

General references

Genesis 34:9
And you make marriages with us, giving your daughters to us, and taking our daughters to you.