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?
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.
2 Arise, go to Padan-aram, to the house of Bethuel thy mother’s father; and take thee a wife from thence of the daughters of Laban thy mother’s brother.
3 And God Almighty bless thee, and make thee fruitful, and multiply thee, that thou mayest be a multitude of people;
4 And give thee the blessing of Abraham, to thee, and to thy seed with thee; that thou mayest inherit the land wherein thou art a stranger, which God gave unto Abraham.
Rebekah needed an excuse to send Jacob away from their home, and we know from previous verses that she was distressed by the pagan wives that Esau had married. And so, killing two birds with one stone, she convinced Isaac to send Jacob to her childhood home to find a wife within the covenant.
It is interesting to note in verse 4 how Isaac admits that Jacob is the rightful heir of Abraham’s blessing. Is this Isaac accepting the outcome of Jacob’s trickery then? Is this him showing that even though he had intended to give the blessing to Esau, he was going to honor what had transpired instead?
I think this moment of Isaac reassuring the blessing upon his son is significant. There is no deception this time, there is no being blinded from the truth. Isaac has a perfectly clear and accurate understanding of this moment, and he is using it to show his support of Jacob.