"...And this is His name by which He shall be called: The Lord Our Righteousness." Jeremiah 23:6

Chapter 11 of Isaiah speaks of the righteous reign of the Branch from Jesse's root who is Christ. Read verses 2-5 for the prophecy of this Branch.
Verse 5 speaks of His righteousness and faithfulness, let's look into what Scripture tells us here.
"Also righteousness will be the belt about His loins, And faithfulness the belt about His waist." Isaiah 11:5

"Righteous art Thou, O Lord,
And upright are Thy judgments.
Thou hast commanded Thy testimonies in righteousness And exceeding faithfulness." Psalm 119:137-138

"The Lord is righteous in all His ways,
And kind in all His deeds." Psalm 145:17

HE IS THE LORD OUR RIGHTEOUSNESS!

This being so then we as His people are to be righteous as we see in the following verses of Scripture:
"For I say to you, that unless your righteousness surpasses that of the scribes and Pharisees, you shall not enter the kingdom of heaven."
Matthew 5:20

"...Put on the new self, which in the likeness of God has been created in righteousness and holiness of the truth." Ephesians 4:24

"Stand firm therefore, having girded your loins with truth, and having put on the breastplate of righteousness." Ephesians 6:14

The Apostle John assures us,
"If you know that He is righteous, you know that everyone also who practices righteousness is born of Him." 1 John 2:29

We have the Apostle Paul's prayer in Philippians 1:9-11, "And this I pray, that your love may abound still more and more in real knowledge and all discernment, So that you may approve the things that are excellent, in order to be sincere and blameless until the day of Christ; Having been FILLED with the FRUIT OF RIGHTEOUSNESS which comes through Jesus Christ, to the glory and praise of God." [My emphasis]

Paul also tells us in 1 Timothy 6:11-12, "...You man [women too] of God...pursue righteousness, godliness, faith, love, perseverance and gentleness. Fight the good fight of faith; take hold of the eternal life to which you have been called..."  [My insert]

I close with Paul's admonition to Timothy, to all Believers, in that same chapter, "O Timothy, guard what has been entrusted to you, avoiding worldly and empty chatter and the opposing arguments of what is falsely called knowledge -- which some have professed and thus gone astray from the faith."
1 Timothy 6:20-21

In this day of massive amounts of knowledge put forth daily, let us heed Paul's warning. We, therefore, need to keep our eyes on Christ and be led by the Holy Spirit into all truth!
"But by His doing you are in Christ Jesus, who became to us wisdom from God, and righteousness and sanctification, and redemption.
That, just as it is written, 'Let him who boasts. boast in the LORD.'"
1 Corinthians 1:30-31

Beloved of God, our righteousness is in Christ. So we can sing:
I am covered over with the robe of righteousness that Jesus gives to me. Is to me.
I am covered over with the precious blood of Jesus for he lives in me. Lives in me.
What a joy it is to know my Heavenly Father loves me so He gives to me My Jesus.
When He looks at me He sees not what I used to be, but He sees Jesus.

Praise His name forever! Amen