A.T. Robertson Commentary Romans 9:30

"What shall we say then? That the Gentiles, who followed not after righteousness, attained to righteousness, even the righteousness which is of faith:" — Romans 9:30 (ASV)

Attained (κατελαβεν). Second aorist active indicative of καταλαμβανω, old verb, to grasp, to seize, to overtake (carrying out the figure in διωκω (to pursue). It was a curious paradox.

Which is of faith (την εκ πιστεως). As Paul has repeatedly shown, the only way to get the God-kind of righteousness.