Genesis 49:3

Reuben, you are my oldest son, the first-fruit of my strength, first in pride and first in power:

Deuteronomy 21:17

But he is to give his first son his birthright, and twice as great a part of his property: for he is the first-fruits of his strength and the right of the first son is his.

Genesis 29:32

And Leah was with child, and gave birth to a son to whom she gave the name Reuben: for she said, The Lord has seen my sorrow; now my husband will have love for me.

Psalm 78:51

He gave to destruction all the first sons of Egypt; the first-fruits of their strength in the tents of Ham;

Psalm 105:36

He put to death the first child of every family in the land, the first-fruits of their strength.

Genesis 46:8

And these are the names of the children of Israel who came into Egypt, even Jacob and all his sons: Reuben, Jacob's oldest son;

Genesis 48:18

And Joseph said to his father, Not so, my father, for this is the older; put your right hand on his head.

Numbers 1:20

The generations of the sons of Reuben, the oldest son of Israel, were numbered by their families and their fathers' houses, every male of twenty years old and over, who was able to go to war;

Numbers 26:5

Reuben, the first son of Israel: the sons of Reuben by their families: of Hanoch, the family of the Hanochites: of Pallu, the family of the Palluites:

1 Chronicles 2:1

These are the sons of Israel: Reuben, Simeon, Levi and Judah, Issachar and Zebulun;

1 Chronicles 5:1

And the sons of Reuben, the oldest son of Israel, (for he was the oldest son, but, because he made his father's bride-bed unclean, his birthright was given to the sons of Joseph, the son of Israel; but he is not to be given the place of the oldest.

1 Chronicles 5:3

The sons of Reuben, the oldest son of Israel: Hanoch and Pallu, Hezron and Carmi.

Treasury of Scripture Knowledge

Summary

Reuben, thou art my firstborn, my might, and the beginning of my strength, the excellency of dignity, and the excellency of power:

General references

Bible References

My firstborn

Genesis 29:32
And Leah was with child, and gave birth to a son to whom she gave the name Reuben: for she said, The Lord has seen my sorrow; now my husband will have love for me.
Genesis 46:8
And these are the names of the children of Israel who came into Egypt, even Jacob and all his sons: Reuben, Jacob's oldest son;
Genesis 48:18
And Joseph said to his father, Not so, my father, for this is the older; put your right hand on his head.
Numbers 1:20
The generations of the sons of Reuben, the oldest son of Israel, were numbered by their families and their fathers' houses, every male of twenty years old and over, who was able to go to war;
Numbers 26:5
Reuben, the first son of Israel: the sons of Reuben by their families: of Hanoch, the family of the Hanochites: of Pallu, the family of the Palluites:
1 Chronicles 2:1
These are the sons of Israel: Reuben, Simeon, Levi and Judah, Issachar and Zebulun;
1 Chronicles 5:1
And the sons of Reuben, the oldest son of Israel, (for he was the oldest son, but, because he made his father's bride-bed unclean, his birthright was given to the sons of Joseph, the son of Israel; but he is not to be given the place of the oldest.

My might

Deuteronomy 21:17
But he is to give his first son his birthright, and twice as great a part of his property: for he is the first-fruits of his strength and the right of the first son is his.
Psalm 78:51
He gave to destruction all the first sons of Egypt; the first-fruits of their strength in the tents of Ham;
Psalm 105:36
He put to death the first child of every family in the land, the first-fruits of their strength.

General references

Numbers 1:20
The generations of the sons of Reuben, the oldest son of Israel, were numbered by their families and their fathers' houses, every male of twenty years old and over, who was able to go to war;
Deuteronomy 33:6
Let life not death be Reuben's, let not the number of his men be small.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain