Watson's Biblical & Theological Dictionary
justice, holiness. The righteousness of God is the essential perfection of his nature; sometimes it is put for his justice. The righteousness of Christ denotes, not only his absolute perfection, but, is taken for his perfect obedience unto death, and his suffering the penalty of the law in our stead. The righteousness of the law is that obedience which the law requires. The righteousness of faith is the justification which is received by faith.
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Watson, Richard. Entry for 'Righteousness'. Richard Watson's Biblical & Theological Dictionary. https://www.studylight.org/dictionaries/eng/wtd/r/righteousness.html. 1831-2.