C. F. Keil and Franz Delitzsch on Genesis 29:25-26

Gen 29:25-26

But when Jacob complained to Laban the next morning of his deception, he pleaded the custom of the country: כּן יעשׂה לא, “it is not accustomed to be so in our place, to give the younger before the first-born.” A perfectly worthless excuse; for if this had really been the custom in Haran as in ancient India and elsewhere, he ought to have told Jacob of it before. But to satisfy Jacob, he promised him that in a week he would give him the younger also, if he would serve him seven years longer for her.