Israel, which followed after the law of righteousness; i.e. the unbelieving Jews, who paid great reverence to the law of God, regarding and observing the outward precepts and ceremonies thereof. Hath not attained to the law of righteousness; they came short of that righteousness which the law requires, which God will accept, and which is to be attained, not by works, but by faith, as it follows in the next verse (see Romans 9:32).
Related Commentaries of Romans 9:31
Romans 9:31
31 But Israel, which followed after the law of righteousness, hath not attained to the law of righteousness.