Genesis 29:23-27

23But in the evening he took Leah his daughter and brought her to Jacob, and Jacob went in to [consummate the marriage with] her.

24Laban also gave Zilpah his maid to his daughter Leah as a maid.

25But in the morning [when Jacob awoke], it was Leah [who was with him]! And he said to Laban, “What is this that you have done to me? Did I not work for you [for seven years] for Rachel? Why have you deceived and betrayed me [like this]?”

26But Laban only said, “It is not the tradition here to give the younger [daughter in marriage] before the older.

27Finish the week [of the wedding feast] for Leah; then we will give you Rachel also, and in return you shall work for me for seven more years.”