The answer is: 19

1 Chr 3:1-9

King David didn't just slay Goliath and unify the kingdom; he also had quite the large family tree! While the Bible counts 19 sons, interestingly, the lineage of David becomes a key touchstone for multiple down-the-line narratives regarding Israel and even modern connections to Jesus, who, as recorded in the New Testament, is also referred to as the "Son of David."

Among David's sons, those like Solomon stand out due to their inheritances and responsibilities. Solomon would go on to build the First Temple in Jerusalem, a significant milestone that's essential for understanding the spiritual and architectural ethos of ancient Israel.

Adding a bit of trivia, can you imagine being in the midst of David's court? It was a bustling scene managed by a king adept at rule and warfare. The unity he brought and his experiences—some triumphs, some failures—shapes not only David’s legacy but the literary and theological underpinnings of the biblical text itself as well.

Moreover, there's a noteworthy moment involving Absalom, one of David's sons, who led a rebellion against David’s rule. This dramatic twist trembles through the text and raises poignant reflections on family loyalty, ambition, and the consequences of strife.

David’s line is one illustrating both achievements and heartaches, truly an epic story worthy of both note and reflection in the broader narrative of Judeo-Christian thought!