Genesis 29:26

29:26 “It is not our custom here,” Laban replied, “to give the younger daughter in marriage before the firstborn.

Genesis 19:38

19:38 The younger daughter also gave birth to a son and named him Ben-Ammi. He is the ancestor of the Ammonites of today.

Genesis 27:15

27:15 Then Rebekah took her older son Esau’s best clothes, which she had with her in the house, and put them on her younger son Jacob.

Genesis 29:18

29:18 Since Jacob had fallen in love with Rachel, he said, “I’ll serve you seven years in exchange for your younger daughter Rachel.”

Genesis 29:27

29:27 Complete my older daughter’s bridal week. Then we will give you the younger one too, in exchange for seven more years of work.”