When God's righteousness is mentioned in the gospel, it is God's action of declaring righteous the unrighteous sinner who has faith in Jesus Christ. The righteousness by which a person is justified (declared righteous) is not his own but that of another, Christ.
Martin LutherAll the passages in the Holy Scriptures that mention assistance are they that do away with "free-will", and these are countless...For grace is needed, and the help of grace is given, because "free-will" can do nothing.
Martin LutherHe who hears this name [God] from a Jew must inform the authorities, or else throw sow dung at him when he sees him and chase him away.
Martin Luther