Sefer Ha-yashar, or, the Book of Jasher…
“ And Esau knew that his brother Jacob had done this, and the anger of Esau was kindled against his brother Jacob that he had acted thus toward him.10 And Esau said, Is he not rightly called Jacob? for he has supplanted me twice, he took away my birthright and now he has taken away my blessing; and Esau wept greatly; and when Isaac heard the voice of his son Esau weeping, Isaac said unto Esau, What can I do, my son, thy brother came with subtlety and took away thy blessing ”
