The answer is: 70

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

King David, a name synonymous with bravery and lyricism, served as one of Israel's most iconic figures. While we often focus on his triumphs, such as defeating the giant Goliath or keenly establishing Jerusalem as the nation’s capital, his life duration of 70 years offers us ripe material for reflection.

It’s interesting to note that David's given age at death places him near the life expectancy of many people today, pointing to the era's robust health despite many hardships. Oftentimes, people faced dire conditions; wars, famines, and personal exploits packed their lives tightly, with David himself facing numerous not-so-glamorous moments—like fleeing from Saul or dealing with his own family strife. He lived richly, layered with human complexities that still resonate deeply today.

In the Old Testament fabric, David is often seen as a foreshadowing of future rulers and leaders, a royal ancestor to the line of Jesus in the biblical narrative—another interesting thread connecting people through history via shared lineage! Did you know that his psalm writing showcases incredible expression of emotion and faith, from despair to hope? These threads don’t just speak of his relationship with God, but they weave into the hearts of believers across ages. David’s bang of atonement, regret, and ultimately, reconciliation is a timeless dance in humanity's ongoing journey towards understanding and forgiveness.