'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.

he hath not given forth upon usury, nor taken increase; he hath withdrawn his hand from unrighteousness, hath executed true judgment between man and man,

Thou wast perfect in thy ways, from the day that thou wast created, till unrighteousness was found in thee.

By the multitude of thine iniquities, by the unrighteousness of thy traffic, thou hast profaned thy sanctuaries: and I have brought forth a fire out of the midst of thee it hath consumed thee; and I have brought thee to ashes upon the earth, in the sight of all them that behold thee.

When I say to the righteous that he shall certainly live, and he trusteth to his righteousness and doeth what is wrong, none of his righteous acts shall be remembered; but in his unrighteousness which he hath done, in it shall he die.