'Righteousness' in the Bible

if ye know that he is righteous, know ye that every one doing the righteousness, of him hath been begotten.

Little children, let no one lead you astray; he who is doing the righteousness is righteous, even as he is righteous,

In this manifest are the children of God, and the children of the devil; every one who is not doing righteousness, is not of God, and he who is not loving his brother,