'Unrighteousness' in the Bible

"When a righteous man abandons his righteousness to practice unrighteousness, I'll set a stumbling block before him. He'll die. If you don't warn him, he'll die in his sin and the righteous deeds that he had practiced won't be remembered, but you'll be held responsible for his death.

You have plowed evil; you have reaped unrighteousness; you have eaten the fruit of hypocrisy; because you trusted in your own direction, and in the number of your mighty forces.

But if our unrighteousness serves to confirm God's righteousness, what can we say? God is not unrighteous when he vents his wrath on us, is he? (I am talking in human terms.)

Stop offering the parts of your body to sin as instruments of unrighteousness. Instead, offer yourselves to God as people who have been brought from death to life and the parts of your body as instruments of righteousness to God.

Then all who have not believed the truth but have taken pleasure in unrighteousness will be condemned.

If we make it our habit to confess our sins, in his faithful righteousness he forgives us for those sins and cleanses us from all unrighteousness.