Jacob marries Leah and Rachel
Jacob agreed to work seven years for Rachel, but Laban tricked him into marrying Leah first; he married Rachel a week later.
Jacob served seven years for Rachel. They seemed to him but a few days, for the love he had for her.
Genesis 29:20 (World English Bible)
The deceiver was deceived. Laban swapped his older daughter for the younger on the wedding night, and Jacob had to promise seven more years of work for Rachel. The rivalry between the sisters shaped the whole family: Leah, the less loved, became the mother of Levi and Judah, the lines of priests and kings.
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Dating notes
Ussher places both marriages soon after Jacob arrived (1760 BC), so that Leah's first sons were born from 1758 BC and Joseph by 1745 BC, at the end of 14 years' service. Alternate: many read Genesis 29:20–21 as the first marriage coming after seven years (about 1753 BC), which squeezes the births of eleven children into seven years.