Sforno on Genesis 27:13/ספורנו על בראשית כ״ז:י״ג

1עלי קללתך, I will take your curse in your place should you become the subject of a curse. We find in Sanhedrin 48, that Solomon is reported to have accepted for himself any curse which would devolve upon him for carrying out his father’s dying wish not to let Yoav die a peaceful death and David’s curses against Yoav. In the event, Solomon or his descendants were afflicted with these curses. [I presume the author just wished to authenticate that Rivkah’s statement was not spurious, and that one can substitute oneself for the target of curses pronounced on someone else. Ed.]