James L. Kugel, in How to Read the Bible, gives us this quote from the rabbinic text Genesis Rabba 70:19.
All night he kept calling her "Rachel" and she kept answering him, "Yes." But "in the morning, behold! It was Leah" [Gen 29:25]. He said to her, "Liar and daughter-of-a-liar!" Leah answered: "Can there be a schoolmaster without any pupils? Was it not just this way that your father called out to you 'Esau' and you answered him [by saying 'Yes']? So when you called out [Rachel], I answered you the same way."