Deuteronomy 6:25 establishes the biblical definition of righteousness.
It will be righteousness to us, if we take care to do all this commandment before Yehova our Elohim, just as He has commanded us.
Let’s see how it sounds when we substitute the word righteousness with this definition in some New Testament scriptures!!
I expected this study to be interesting, but it turned out to be quite fascinating!!

Matthew 5:6
“Blessed are those who hunger and thirst for righteousness,
    for they shall be satisfied.”
“Blessed are those who hunger and thirst for doing all this commandment before Yehova our Elohim, just as He has commanded us, for they shall be satisfied.”

Matthew 5:10
“Blessed are those who have been persecuted for the sake of righteousness, for theirs is the kingdom of heaven.”
“Blessed are those who have been persecuted for doing all this commandment before Yehova our Elohim, just as He has commanded us, for theirs is the kingdom of heaven.”

Matthew 6:33
But seek first the kingdom of Yehova and His righteousness, and all these things shall be added to you.
But seek first the kingdom of Yehova and doing all this commandment before Yehova our Elohim, just as He has commanded us, and all these things shall be added to you.

Matthew 13:43
Then the righteous will shine forth as the sun in the kingdom of their Father. He who has ears, let him hear!
Then those who do all this commandment before Yehova our Elohim, just as He has commanded us will shine forth as the sun in the kingdom of their Father. He who has ears, let him hear!

Matthew 25:46
46 These shall go off to everlasting punishment, but the righteous into everlasting life.
46 These shall go off to everlasting punishment, but those who do all this commandment before Yehova our Elohim, just as He has commanded us, into everlasting life.

Luke 1:6   [Wow, this one confirms the Deuteronomy 6 definition for us!!]
Together they were righteous before Adonai, walking without fault in all His commandments and instructions.
Together they were those who do all this commandment before Yehova our Elohim, just as He has commanded us before Adonai, walking without fault in all His commandments and instructions.

Luke 1:17
And he will go before Him in the spirit and power of Elijah, to turn the hearts of fathers to the children and the disobedient ones to the wisdom of the righteous, to make ready for Yehova a prepared people.
And he will go before Him in the spirit and power of Elijah, to turn the hearts of fathers to the children and the disobedient ones to the wisdom of those who do all this commandment before Yehova our Elohim, just as He has commanded us, to make ready for Yehova a prepared people.

Luke 23:47
Now when the centurion saw what had happened, he began glorifying Yehova, saying, “Truly this was a righteous Man.”
Now when the centurion saw what had happened, he began glorifying Yehova, saying, “Truly this was a man who does all this commandment before Yehova our Elohim, just as He has commanded us.”

John 7:24
Do not judge by appearance, but judge righteously.”
Do not judge by appearance, but judge by doing all this commandment before Yehova our Elohim, just as He has commanded us.”

Acts 10:22
And they said, “Cornelius, a centurion, a righteous and Yehova-fearing man well-spoken of by all the Jewish people, was directed by a holy angel to summon you to his house and to hear a message from you.”
And they said, “Cornelius, a centurion, a man who does all this commandment before Yehova our Elohim, just as He has commanded us, and Yehova-fearing man well-spoken of by all the Jewish people, was directed by a holy angel to summon you to his house and to hear a message from you.”

Acts 13:10
…and said, “O you, full of all deceit and trickery, son of the devil, enemy of all righteousness—will you not stop making crooked the straight paths of Yehova?
…and said, “O you, full of all deceit and trickery, son of the devil, enemy of all who are doing all this commandment before Yehova our Elohim, just as He has commanded us, —will you not stop making crooked the straight paths of Yehova?

Acts 17:31
For He has set a day on which He will judge the world in righteousness, through a Man whom He has appointed. 
For He has set a day on which He will judge the world according to doing all this commandment before Yehova our Elohim, just as He has commanded us, through a Man whom He has appointed. 

Romans 3:4
May it never be! Let Yehova be true even if every man is a liar, as it is written, “that You may be righteous in Your words and prevail when You are judged.”
May it never be! Let Yehova be true even if every man is a liar, as it is written, “that You may be doing all this commandment before Yehova our Elohim, just as He has commanded us, in Your words and prevail when You are judged.”

Romans 6:17
But thanks be to Yehova that though you were slaves of sin, you wholeheartedly obeyed the form of teaching under which you were placed; 18 and after you were set free from sin, you became enslaved to righteousness.
But thanks be to Yehova that though you were slaves of sin, you wholeheartedly obeyed the form of teaching under which you were placed; 18 and after you were set free from sin, you became enslaved to doing all this commandment before Yehova our Elohim, just as He has commanded us.’

Romans 8:10
But if Messiah is in you, though the body is dead because of sin, yet the Spirit is alive because of righteousness.
But if Messiah is in you, though the body is dead because of sin, yet the Spirit is alive because of you do all this commandment before Yehova our Elohim, just as He has commanded us.

Romans 14:17
…for the kingdom of Yehova is not about eating and drinking, but righteousness and shalom and joy in the Ruach ha-Kodesh.
…for the kingdom of Yehova is not about eating and drinking, but doing all this commandment before Yehova our Elohim, just as He has commanded us, and shalom and joy in the Ruach ha-Kodesh.

1Timothy 6:11
But you, O man of Yehova, flee from these things and pursue righteousness, Yehovaliness, faithfulness, love, perseverance, and gentleness.
But you, O man of Yehova, flee from these things and pursue doing all this commandment before Yehova our Elohim, just as He has commanded us, Yehovaliness, faithfulness, love, perseverance, and gentleness.

2Timothy 2:22
Now flee from youthful desires; instead, pursue righteousness, faithfulness, love, and shalom, with those who call on Yehova from a pure heart.
Now flee from youthful desires; instead, pursue doing all this commandment before Yehova our Elohim, just as He has commanded us, faithfulness, love, and shalom, with those who call on Yehova from a pure heart.

2Timothy 3:16
All Scripture is inspired by Yehova and useful for teaching, for reproof, for restoration, and for training in righteousness,
All Scripture is inspired by Yehova and useful for teaching, for reproof, for restoration, and for training in doing all this commandment before Yehova our Elohim, just as He has commanded us,

Titus 2:11-14
11 For the grace of Yehova has appeared, bringing salvation to all men, 12 training us to deny unYehovaliness and worldly desires and to live in a manner that is self-controlled and righteous and Yehovaly in the present age. 13 We wait for the blessed hope and appearance of the glory of our great Yehova and Savior, Messiah Yeshua. 14 He gave Himself for us so that He might redeem us from every lawless deed and so that He might purify for Himself a chosen people, zealous for good deeds.
11 For the grace of Yehova has appeared, bringing salvation to all men, 12 training us to deny unYehovaliness and worldly desires and to live in a manner that is self-controlled and doing all this commandment before Yehova our Elohim, just as He has commanded us, and Yehovaly in the present age. 13 We wait for the blessed hope and appearance of the glory of our great Yehova and Savior, Messiah Yeshua. 14 He gave Himself for us so that He might redeem us from every lawless deed and so that He might purify for Himself a chosen people, zealous for good deeds.

Hebrews 1:9
You have loved righteousness and hated lawlessness; therefore Yehova, Your Yehova, has anointed You with the oil of gladness above Your companions.”
You have loved doing all this commandment before Yehova our Elohim, just as He has commanded us, and hated lawlessness; therefore Yehova, Your Yehova, has anointed You with the oil of gladness above Your companions.”

Hebrews 5:13
11 About this subject there is much for us to say, and it is hard to explain since you have become sluggish in hearing. 12 For although you ought to be teachers by this time, again you need someone to teach you the basics of Yehova’s sayings. You have come to need milk, not solid food. 13 For anyone living on milk is inexperienced with the teaching about righteousness—he is an infant. 14 But solid food is for the mature, who through practice have their senses trained to discern both good and evil.
11 About this subject there is much for us to say, and it is hard to explain since you have become sluggish in hearing. 12 For although you ought to be teachers by this time, again you need someone to teach you the basics of Yehova’s sayings. You have come to need milk, not solid food. 13 For anyone living on milk is inexperienced with the teaching about doing all this commandment before Yehova our Elohim, just as He has commanded us, —he is an infant. 14 But solid food is for the mature, who through practice have their senses trained to discern both good and evil.

Hebrews 12:11
Now all discipline seems painful at the moment—not joyful. But later it yields the peaceful fruit of righteousness to those who have been trained by it.
Now all discipline seems painful at the moment—not joyful. But later it yields the peaceful fruit of doing all this commandment before Yehova our Elohim, just as He has commanded us, to those who have been trained by it.

James 2:24
You see that a man is proved righteous by works and not by faith alone.
You see that a man is proved to be one doing all this commandment before Yehova our Elohim, just as He has commanded us, by works and not by faith alone.

James 5:16
So confess your offenses to one another and pray for one another so that you may be healed. The effective prayer of a righteous person is very powerful.
So confess your offenses to one another and pray for one another so that you may be healed. The effective prayer of a person doing all this commandment before Yehova our Elohim, just as He has commanded us, is very powerful.
REMINDS ME OF THIS:
Proverbs 28:9
One who turns his ear from hearing Torah
—even his prayer is an abomination.

1Peter 2:24
He Himself bore our sins in His body on the tree, so that we, removed from sins, might live for righteousness. “By His wounds you were healed.”
He Himself bore our sins in His body on the tree, so that we, removed from sins, might live for doing all this commandment before Yehova our Elohim, just as He has commanded us. “By His wounds you were healed.”

1Peter 3:12
For the eyes of Adonai are on the righteous and His ears open to their prayer, but the face of Yehova is against those who do evil.”
For the eyes of Adonai are on those doing all this commandment before Yehova our Elohim, just as He has commanded us, and His ears open to their prayer, but the face of Yehova is against those who do evil.”

1Peter 4:18
Now, “if it is hard for the righteous to be saved, what shall become of the unYehovaly and the sinner?”
Now, “if it is hard for those doing all this commandment before Yehova our Elohim, just as He has commanded us, to be saved, what shall become of the unYehovaly and the sinner?”

2Peter 2:21
For it would have been better for them not to have known the way of righteousness, than after learning about it, to turn back from the holy commandment passed on to them.
For it would have been better for them not to have known the way of doing all this commandment before Yehova our Elohim, just as He has commanded us, than after learning about it, to turn back from the holy commandment passed on to them.

2Peter 3:13
But in keeping with His promise, we look for new heavens and a new earth, where righteousness dwells.
But in keeping with His promise, we look for new heavens and a new earth, where those doing all this commandment before Yehova our Elohim, just as He has commanded us dwell.

REMINDS ME OF THIS:
Revelation 22:14 [those allowed into heaven on earth, the City of New Jerusalem described in Rev 21]
14 Blessed are those who do His commandments, that they may have the right to the tree of life, and may enter through the gates into the city.

1John 3:7
Children, let no one mislead you! The one who practices righteousness is righteous, just as Yeshua is righteous.
Children, let no one mislead you! The one who practices doing all this commandment before Yehova our Elohim, just as He has commanded us, is righteous, just as Yeshua is righteous.
REMINDS ME OF THIS:
1John 2:3-6
3 Now by this we know that we know Him, if we keep His commandments. 4 He who says, “I know Him,” and does not keep His commandments, is a liar, and the truth is not in him. 5 But whoever keeps His word, truly the love of Yehova is perfected in him. By this we know that we are in Him. 6 He who says he abides in Him ought himself also to walk just as He walked.

1John 3:10
It is clear who are the children of Yehova and who are the children of the devil by this—anyone who does not act righteously or love his brother is not of Yehova.
It is clear who are the children of Yehova and who are the children of the devil by this—anyone who does not do all this commandment before Yehova our Elohim, just as He has commanded us, or love his brother is not of Yehova.
REMINDS ME OF THIS:
Luke 6:46
“But why do you call Me ‘Lord, Lord,’ and not do the things which I say?

The bible also defines sin for us:
1John 3:4
Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law. [KING JAMES]
Everyone who keeps sinning is violating Torah – indeed, sin is violation of Torah. [CJB]

In my next study, I’ll substitute this definition of sin into various scriptures that speak of sin.  Stay tuned!