In spite of his great respect for his mother, Jacob refused at first to heed her command. He feared he might commit a sin, especially as he might thus bring his father's curse down upon him. As it was, Isaac might still have a blessing for him, after giving Esau his. But Rebekah allayed his anxieties, with the words: "When Adam was cursed, the malediction fell upon his mother, the earth, and so shall I, thy mother, bear the imprecation, if thy father curses thee. Moreover, if the worst comes to the worst, I am prepared to step before thy father and tell him, 'Esau is a villain, and Jacob is a righteous man.' "
Jacob in Paradise
Legends of the Jews 6:58