When the words of her older son Esau were relayed to Rebekah, she sent for her younger son Jacob and told him, "Look, your brother Esau is consoling himself by plotting to kill you.

Genesis 27:41
Esau held a grudge against Jacob because of the blessing his father had given him. And Esau said in his heart, "The days of mourning for my father are at hand; then I will kill my brother Jacob."

Genesis 27:43
So now, my son, obey my voice and flee at once to my brother Laban in Haran.

Genesis 32:3
Jacob sent messengers ahead of him to his brother Esau in the land of Seir, the country of Edom.

Genesis 32:11
Please deliver me from the hand of my brother Esau, for I am afraid that he may come and attack me and the mothers and children with me.

And these words of Esau her elder son were told to Rebekah: and she sent and called Jacob her younger son, and said to him, Behold, your brother Esau, as touching you, does comfort himself, purposing to kill you.