Isaiah 11:5

Righteousness will be the belt of his waist, and faithfulness the belt of his waist.

Isaiah 25:1

The LORD, you are my God. I will exalt you. I will praise your name, for you have done wonderful things, things planned long ago, in complete faithfulness and truth.

Ephesians 6:14

Stand therefore, having the utility belt of truth buckled around your waist, and having put on the breastplate of righteousness,

Psalm 93:1

The LORD reigns. He is clothed with majesty. The LORD is armed with strength. The world also is established. It can't be moved.

Isaiah 59:17

He put on righteousness as a breastplate, and a helmet of salvation on his head; and he put on garments of vengeance for clothing, and was clad with zeal as a mantle.

Hosea 2:20

I will even betroth you to me in faithfulness; and you shall know the LORD.

2 Corinthians 6:7

in the word of truth, in the power of God; by the armor of righteousness on the right hand and on the left,

Hebrews 2:17

Therefore he was obligated in all things to be made like his brothers, that he might become a merciful and faithful high priest in things pertaining to God, to make atonement for the sins of the people.

1 Peter 4:1

Forasmuch then as Christ suffered in the flesh, arm yourselves also with the same mind; for he who has suffered in the flesh has ceased from sin;

1 John 1:9

If we confess our sins, he is faithful and righteous to forgive us the sins, and to cleanse us from all unrighteousness.

Revelation 1:13

And among the lampstands was one like a son of man, clothed with a robe reaching down to his feet, and with a golden sash around his chest.

Revelation 3:14

"To the angel of the church in Laodicea write: "The Amen, the Faithful and True Witness, the Head of God's creation, says these things:

Treasury of Scripture Knowledge

Summary

And righteousness shall be the girdle of his loins, and faithfulness the girdle of his reins.

Bible References

Righteousness

Isaiah 59:17
He put on righteousness as a breastplate, and a helmet of salvation on his head; and he put on garments of vengeance for clothing, and was clad with zeal as a mantle.
Psalm 93:1
The LORD reigns. He is clothed with majesty. The LORD is armed with strength. The world also is established. It can't be moved.
2 Corinthians 6:7
in the word of truth, in the power of God; by the armor of righteousness on the right hand and on the left,
Ephesians 6:14
Stand therefore, having the utility belt of truth buckled around your waist, and having put on the breastplate of righteousness,
1 Peter 4:1
Forasmuch then as Christ suffered in the flesh, arm yourselves also with the same mind; for he who has suffered in the flesh has ceased from sin;
Revelation 1:13
And among the lampstands was one like a son of man, clothed with a robe reaching down to his feet, and with a golden sash around his chest.

And faithfulness

Isaiah 25:1
The LORD, you are my God. I will exalt you. I will praise your name, for you have done wonderful things, things planned long ago, in complete faithfulness and truth.
Hosea 2:20
I will even betroth you to me in faithfulness; and you shall know the LORD.
Hebrews 2:17
Therefore he was obligated in all things to be made like his brothers, that he might become a merciful and faithful high priest in things pertaining to God, to make atonement for the sins of the people.
1 John 1:9
If we confess our sins, he is faithful and righteous to forgive us the sins, and to cleanse us from all unrighteousness.
Revelation 3:14
"To the angel of the church in Laodicea write: "The Amen, the Faithful and True Witness, the Head of God's creation, says these things:

General references

Exodus 40:12
You shall bring Aaron and his sons to the door of the Tent of Meeting, and shall wash them with water.
Psalm 9:8
He will judge the world in righteousness. He will administer judgment to the peoples in uprightness.
Galatians 5:15
But if you bite and devour one another, be careful that you do not consume one another.