What does the Bible say about David's reign and its significance?

David's reign is a pivotal period in biblical history, representing God's chosen king over Israel. It showcases the grace and mercy of God, as well as His sovereign plan for redemption through the lineage of David, which ultimately leads to Jesus Christ. Despite David's sins and imperfections, his kingship serves as a foreshadowing of Christ, who is the ultimate King and Savior. David's life and reign exemplify the gravity of sin, the necessity of atonement, and the establishment of God's promise through an eternal kingdom.