Genesis 49:4

Vain glorious as water, thou shalt not be preeminent; for thou didst go up out of thy father's. bed; then didst thou defile, going up to my couch.

Genesis 35:22

And it will be in the dwelling of Israel in that land, and Reuben will go, and will lie with Bilhah, his father's concubine: and Israel will hear. And the sons of Jacob will be twelve.

Deuteronomy 27:20

Cursed he lying with his father's wife, for he uncovered his father's wing: and all the people said, Amen.

1 Chronicles 5:1

And the sons of Reuben the first-born of Israel, (for he the firstborn; and in his defiling his father's bed, the birth-right was given to the sons of Joseph the son of Israel; and not to be enrolled for the birthright

Genesis 46:8

And these the names of the sons of Israel having come to Egypt. Jacob and his sons: the first born of Jacob, Reuben.

Numbers 32:1-42

And much cattle was to the sons of Reuben and to the sons of Gad exceedingly strong: and they will see the land of Jazer and the land of Gilead, and behold, the place a place of cattle.

Deuteronomy 5:21

and thou shalt not desire thy friend's wife; and thou shalt not long for thy friend's house, his field, and his servant, and his maid, his ox and his ass, and all that is to thy friend.

Deuteronomy 33:6

Reuben shall live and shall not die; and his men shall be of number.

1 Corinthians 5:1

In general is fornication heard among you, and such fornication which is not named in the nations, for any to have his father's wife.

James 1:6-8

And let him ask in faith, being at variance in nothing. For he being at variance is like the surge of the sea being moved by the wind and put in motion.

2 Peter 2:14

Having eyes full of an adulteress, not ceasing from sin; decoying unstable souls: having a heart exercised with covetousness; children of a curse:

2 Peter 3:16

As also in all the epistles, speaking in them of these things; in which are some things difficult to understand, which the unlearned and unstable pervert, as also the rest of the writings, to their own perdition.

Treasury of Scripture Knowledge

Summary

Unstable as water, thou shalt not excel; because thou wentest up to thy father's bed; then defiledst thou it: he went up to my couch.

Thou shalt not excel

Bible References

Unstable

James 1:6
And let him ask in faith, being at variance in nothing. For he being at variance is like the surge of the sea being moved by the wind and put in motion.
2 Peter 2:14
Having eyes full of an adulteress, not ceasing from sin; decoying unstable souls: having a heart exercised with covetousness; children of a curse:
2 Peter 3:16
As also in all the epistles, speaking in them of these things; in which are some things difficult to understand, which the unlearned and unstable pervert, as also the rest of the writings, to their own perdition.

Thou shalt not excel

Genesis 46:8
And these the names of the sons of Israel having come to Egypt. Jacob and his sons: the first born of Jacob, Reuben.
Deuteronomy 33:6
Reuben shall live and shall not die; and his men shall be of number.

Because

Genesis 35:22
And it will be in the dwelling of Israel in that land, and Reuben will go, and will lie with Bilhah, his father's concubine: and Israel will hear. And the sons of Jacob will be twelve.
Deuteronomy 5:21
and thou shalt not desire thy friend's wife; and thou shalt not long for thy friend's house, his field, and his servant, and his maid, his ox and his ass, and all that is to thy friend.
Deuteronomy 27:20
Cursed he lying with his father's wife, for he uncovered his father's wing: and all the people said, Amen.
1 Chronicles 5:1
And the sons of Reuben the first-born of Israel, (for he the firstborn; and in his defiling his father's bed, the birth-right was given to the sons of Joseph the son of Israel; and not to be enrolled for the birthright
1 Corinthians 5:1
In general is fornication heard among you, and such fornication which is not named in the nations, for any to have his father's wife.

General references

Leviticus 18:8
The nakedness of thy father's wife thou shalt not uncover: it is thy father's nakedness.
Numbers 1:20
And the sons of Reuben, the firstborn of Israel, shall be their generations, according to their families, according to the house of their fathers, according to the number of names, according to their heads, every male from the son of twenty years and above, all going forth to war.
Deuteronomy 27:20
Cursed he lying with his father's wife, for he uncovered his father's wing: and all the people said, Amen.
Deuteronomy 33:6
Reuben shall live and shall not die; and his men shall be of number.