How do God's promises to David relate to the New Testament?

In Psalm 132, God's promises to David about his lineage and throne find ultimate fulfillment in Jesus Christ, the Son of David. While the covenant with David's natural sons was conditional, the covenant with Christ is unconditional and eternal. God decreed that one of David's descendants would sit upon the throne forever, which is realized in Jesus, whose reign over the house of Jacob is eternal. This promise embodies the hope and assurance for spiritual Israel, where Christ serves as the mediator and shepherd, fulfilling God’s overarching redemptive plan.