Genesis 29:20-27

So Jacob worked for Laban seven years so he could marry Rachel. But they seemed like just a few days to him because he loved Rachel very much. After seven years Jacob said to Laban, “Give me Rachel so that I may marry her. The time I promised to work for you is over.” So Laban gave a feast for all the people there. That evening he brought his daughter Leah to Jacob, and they had sexual relations. (Laban gave his slave girl Zilpah to his daughter to be her servant.) In the morning when Jacob saw that he had had sexual relations with Leah, he said to Laban, “What have you done to me? I worked hard for you so that I could marry Rachel! Why did you trick me?” Laban said, “In our country we do not allow the younger daughter to marry before the older daughter. But complete the full week of the marriage ceremony with Leah, and I will give you Rachel to marry also. But you must serve me another seven years.”