The answer is: 70

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

King David, the famous shepherd boy who took down Goliath, reigned as Israel's second king and served a lifetime packed with conflict, triumph, and deep spiritual insight. He lived a vibrant life and died at the age of 70, as per the accounts in 2 Samuel and 1 Kings. It's interesting to note that, in the ancient Hebrew culture, reaching 70 was often considered the mark of a full and blessed life; however, David's life was marked by multiple phases, highlighting both his humanity and legacy.

His reign lasted for 40 years—a period rich with foundational events for ancient Israel, including unifying the tribes and making Jerusalem the capital. Did you know that Jerusalem was initially a Jebusite stronghold before David conquered it? That victory added immense symbolic importance to his reign, signaling both a political and spiritual turning point for the nation.

David is also credited with composing many of the Psalms, pieces that showcase his deep emotions — from intense joy to grave sorrow. These poems capture the human experience and continue to resonate with people today. Interestingly, such expression can be seen in the contrast of his victorious moments to his infamous falls from grace, reminding us all that leadership often comes with great struggles and personal challenges.

Beautifully, David was a man of destiny, illustrating how our triumphs and failures can contribute to our life story, redeeming even the darkest paths through introspection and faith.