Genesis 29:18-19, 27

Jacob loved Rachel, so he said to Laban, “Let me marry your younger daughter Rachel. If you will, I will work seven years for you.” Laban said, “It would be better for her to marry you than someone else, so stay here with me.”

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.”