Or HaChaim on Genesis 27:8/אור החיים על בראשית כ״ז:ח׳

1 ועתה בני שמע בקולי, "and now my son, listen to me and obey my instructions!" "hasten to bring me two young kids at once."

2שמע בקולי. "listen to my voice!" Although there is some deception involved in what I will instruct you, you still have to obey me apart from your duty to honour father and mother which is a positive commandment. Rebeccah stressed the fact that she was a prophetess and the Torah commands us to obey the prophets' instructions (Deut. 18,15). We have already explained (in connection with Genesis 16,5) that when a prophet asks you to disobey one of G'd's laws temporarily he is to be obeyed.