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 forbids marrying two sisters — directly prohibiting the very arrangement Laban forces here. The patriarchs' experience likely informed this law.