For the justice of God is revealed within it, by faith unto faith, just as it was written: "For the just one lives by faith.
Other versions
King James Version
For therein is the righteousness of God revealed from faith to faith: as it is written, The just shall live by faith.English Standard Version
For in it the righteousness of God is revealed from faith for faith, as it is written, "The righteous shall live by faith."New International Version
For in the gospel a righteousness from God is revealed, a righteousness that is by faith from first to last, just as it is written: "The righteous will live by faith."