Treasury of Scripture Knowledge
But it cannot be denied that all that the Law says is addressed to those who are living under the Law, in order that every mouth may be stopped, and that the whole world may await sentence from God.
For if it is the righteous through Law who are heirs, then faith is useless and the promise counts for nothing.
Moses says that he whose actions conform to the righteousness required by the Law shall live by that righteousness.
and the Law has nothing to do with faith. It teaches that "he who does these things shall live by doing them."