It is a joy for the just to do justice, but destruction will come to the workers of iniquity. Proverbs 21:15
Joy: exceedingly, gladness, joyfulness, mirth, pleasure, rejoicing in festivity
Just: lawful, righteous man
To do: accomplish
Justice: attribute of right, rectitude
Destruction: dismay, ruin
Workers: habitually commit, do
Iniquity: mischief, wickedness, strictly nothingness
He has shown you, O man, what is good; and what does the Lord require of you but to do justly, to love mercy, and to walk humbly with your God? Micah 6:8
To do justly is not to be done with a begrudging attitude. Rather obedience should be done with joy. The word, "joy" in Proverbs 21:15 means "party of joy". And that party of joy comes when one accomplishes what is right, not according to themselves, but rather right according to God.
The Required Routine of "Do justly" is to be accomplished with a party of joy. It's not just about doing what is right, it's about having the right attitude while doing.
It's a Party! And all are invited. Do justly!