Why is the covenant in Psalm 105 significant?

Psalm 105 highlights the everlasting covenant that God made with Abraham, Isaac, and Jacob, emphasizing that this covenant is foundational to understanding God's relationship with His people. Unlike the law given to Moses, which was meant to reveal sin, the covenant encapsulates the promise of justification by faith, pointing to the righteousness of Christ. This covenant assures believers that, through faith, they are partakers of the same promise, reaffirming that salvation is a work of God's grace rather than human effort. It establishes the continuity of God's redemptive plan culminating in the new covenant established by Christ, linking the Old Testament to the New Testament and demonstrating God's unwavering faithfulness.