The answer is: 40 years

1 Ki 2:11

David's reign over Israel, spanning 40 years, stands out as a remarkable chapter in biblical history. His rule can be divided into two distinct parts: the first seven years over Judah in Hebron and the subsequent 33 years over a united Israel in Jerusalem. This transition not only signified David's political acumen but also his skill in uniting diverse tribes under one banner—a feat that's no small challenge!

Did you know that David is often remembered for his complexity as a leader? He's not just the "sweet psalmist of Israel," but also a warrior king, a schemer, and someone with deep personal failings. From his stunning victory over Goliath to his infamous sin with Bathsheba, his life reflects a mixture of divine favor and human frailty. It's this relatable humanity that draws many to his story.

Also, 40 years as a period of reign has interesting biblical parallels. The Israelites wandered in the desert for 40 years before settling in the Promised Land, symbolizing a time of growing in maturity and understanding. In many biblical texts, numbers often carry deeper significance. The number 40 refers not only to a set period of time but often to a transformative process.

Moreover, the Book of Psalms—many written by David—is central to worship and personal devotion; they continue to inspire countless people, reflecting David's lasting influence. His story resonates across the ages, showing us that great leadership can come wrapped in vulnerability, imperfections, and profound ambition.