Genesis 29:27
Fulfil her week, and we will give thee this also for the service which thou shalt serve with me yet seven other years.
Cross-reference
Genesis 29:20
Historical context
In Genesis 29:20, these same seven years of labor are described as feeling like only a few days because of Jacob's love for Rachel — the devotion behind the demand Laban makes here.
Genesis 31:15
Historical context
In Genesis 31:15, Leah and Rachel later describe their father as having 'sold' them and consumed the price — directly naming the exploitation Laban practices here.
Leviticus 18:18
Contrast
Leviticus 18:18 forbids marrying two sisters — directly prohibiting the very arrangement Laban forces here. The patriarchs' experience likely informed this law.