Deuteronomy 6:25

And it shall be our righteousness if we observe to do all these commandments before the Lord, our God, as He hath commanded us. In this the righteousness of the children of Israel consisted, namely, that they observed and kept the will of the Lord in the love which flows from true faith. Thus the righteousness of faith always precedes the righteousness of life, and the latter serves to indicate the presence of the former. The believers in Christ will not walk after the flesh, but after the Spirit, and thus give evidence of the fact that they are possessors of justification by faith.