Genesis 29:26

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

Genesis 43:33

43:33 They sat before him, arranged by order of birth, beginning with the firstborn and ending with the youngest. The men looked at each other in astonishment.

Genesis 19:31

19:31 Later the older daughter said to the younger, “Our father is old, and there is no man anywhere nearby to have sexual relations with us, according to the way of all the world.

Genesis 19:35

19:35 So they made their father drunk that night as well, and the younger one came and had sexual relations with him. But he was not aware that she had sexual relations with him and then got up.

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 25:23

25:23 and the Lord said to her,

“Two nations are in your womb,

and two peoples will be separated from within you.

One people will be stronger than the other,

and the older will serve the younger.”

Genesis 19:34

19:34 So in the morning the older daughter said to the younger, “Since I had sexual relations with my father last night, let’s make him drunk again tonight. Then you go and have sexual relations with him so we can preserve our family line through our father.”

Genesis 48:14

48:14 Israel stretched out his right hand and placed it on Ephraim’s head, although he was the younger. Crossing his hands, he put his left hand on Manasseh’s head, for Manasseh was the firstborn.