The answer is: 70

2 Sam 5:4; 1 Ki 2:10-11

David, the storied second king of Israel, is said to have lived to the respectful age of 70 years. His reign as king began around 1010 B.C.E., and ruled a united Israel for over 30 years—a testament to his resilience and leadership. The scriptures noted in 2 Samuel 5:4 and 1 Kings 2:10-11 reflect not just a historical note of his age at death, but also emphasize his significant contributions and steadfast heart for the people of Israel.

Now, diving into David's life reveals a blend of triumphs and trials. One interesting nugget is that despite his many questionable decisions—as illustrated in the story of Bathsheba—he is often called someone “after God’s own heart” (Acts 13:22). This juxtaposition invites readers to reflect on the complexity of human nature and the theme of redemption that runs through the entire narrative.

At 70, while far from old by today's standards, David's life was packed with adventure; from his humble beginnings as a shepherd boy to slaying Goliath and ultimately ascending the throne, his journey encapsulated many of the struggles and triumphs of leadership. Also notable is the era he'd lived through, marked by passion, war, poetry, and spiritual fervor, demonstrated in his profound psalms. It's like every experience he had was interwoven into the fabric of the nation's identity, solidifying his legacy that continues to resonate across generations.