Where is the evidence in the Hebrew Scriptures of “righteousness” (a right standing with God) apart from the works of the Law?

Jesus Christ is the fulfillment of the promise made to Abraham in Genesis 12:3b concerning a “blessing to all the families of the Earth” and those who receive that promise by faith in Jesus as Lord are also considered children of Abraham whether they’re Gentiles or Jacob’s children (Jew or Israelite) as our father having received the promise by faith; that is, Abraham, was a Gentile, not a Jew or Israelite; therefore, the promise of eternal life through the forgiveness of sin is not through the Law of the Covenant or Israel but of faith as demonstrated by Abraham who “believed” God 430-years before the giving of the Law at Sinai (Genesis 15:6; Galatians 3:17).

It is written,

“Thus Abraham “believed God, and it was reckoned to him as righteousness.” So you see that it is men of faith who are the sons of Abraham. And the scripture, foreseeing that God would justify the Gentiles by faith, preached the gospel beforehand to Abraham, saying, “In you shall all the nations be blessed.” So then, those who are men of faith are blessed with Abraham who had faith.”

17 What I am saying is this: the Law, which came 430 years later, does not invalidate a covenant previously ratified by God, so as to nullify the promise.

Galatians 3

In closing,

The Law of the Covenant, a reiteration of the moral law extant from the creation of the angels, given Jacob’s children 430-years subsequent to the promise, was simply a school-master or tutor to point Israel to their need for a Redeemer; but now, in the New Covenant, the fulfillment of what the Law foreshadowed has come to fruition in Jesus Christ; therefore, we are no longer in need of a tutor as its reality has manifest in Time and performed that which the Law could only point to but not accomplish due to the weakness of the flesh (Romans 8:1-4); that is, faith in Messiah Jesus for the forgiveness of sin and eternal life through the promised covenant established first by God with Abraham, our father through the promise by faith. Again, it is written,

13 For the promise to Abraham or to his descendants that he would be heir of the world was not through the Law, but through the righteousness of faith. 14 For if those who are of the Law are heirs, then faith is made void and the promise is nullified; 15 for the Law brings about wrath, but where there is no law, there also is no violation.

16 For this reason it is by faith, in order that it may be in accordance with grace, so that the promise will be guaranteed to all the descendants, not only to those who are of the Law, but also to those who are of the faith of Abraham, who is the father of us all, 17 (as it is written: “I have made you a father of many nations”) in the presence of Him whom he believed, that is, God, who gives life to the dead and calls into being things that do not exist. Romans 4 (NASB)