Deuteronomy 21:17

Instead he shall acknowledge the son of the unloved as the firstborn, by giving him a double portion of all that he has, for he was the beginning of his strength (generative power); to him belongs the right of the firstborn.

Genesis 49:3


“Reuben, you are my firstborn;
My might, the beginning of my strength and vigor,
Preeminent in dignity and preeminent in power [that should have been your birthright].

Genesis 25:31-34

Jacob answered, “First sell me your birthright (the rights of a firstborn).”

Genesis 25:5-6

Now Abraham gave everything that he had to Isaac;

1 Chronicles 5:1-2

Now [we come to] the sons of Reuben the firstborn of Israel—for Reuben was the eldest, but because he defiled his father’s bed [with Bilhah his father’s concubine], his birthright was given to [Manasseh and Ephraim] the sons of Joseph [the favorite] son of Israel, so that he is not enrolled in the genealogy according to the birthright.

Psalm 105:36


He also struck down all the firstborn in their land,
The first fruits and chief substance of all their strength.

Treasury of Scripture Knowledge

Summary

But he shall acknowledge the son of the hated for the firstborn, by giving him a double portion of all that he hath: for he is the beginning of his strength; the right of the firstborn is his.

The beginning

The right

Bible References

By giving

Genesis 25:5
Now Abraham gave everything that he had to Isaac;
1 Chronicles 5:1
Now [we come to] the sons of Reuben the firstborn of Israel—for Reuben was the eldest, but because he defiled his father’s bed [with Bilhah his father’s concubine], his birthright was given to [Manasseh and Ephraim] the sons of Joseph [the favorite] son of Israel, so that he is not enrolled in the genealogy according to the birthright.

The beginning

Genesis 49:3

“Reuben, you are my firstborn;
My might, the beginning of my strength and vigor,
Preeminent in dignity and preeminent in power [that should have been your birthright].
Psalm 105:36

He also struck down all the firstborn in their land,
The first fruits and chief substance of all their strength.

The right

Genesis 25:31
Jacob answered, “First sell me your birthright (the rights of a firstborn).”