The answer is: Araunah's

2 Sam 24:18-25 - Later the place where Solomon built the temple

The threshold of Araunah the Jebusite was no ordinary piece of land—it was a pivotal plot in biblical history! This location became the site where King David was instructed to build an altar to the Lord during a moment of national crisis. Arguably, this was not just any piece of ground; it became the very heart of ancient Israel when Solomon constructed the temple there.

Isn’t it fascinating how this simple threshing floor transformed into one of the most sacred sites in Judeo-Christian tradition? It's a reflection of how the simplest things can be instruments of profound change. Threshing floors were places of productivity, where grains were separated from chaff—a fitting metaphor for purification and spiritual significance!

Also, Araunah himself is an interesting character. When David approached him, Araunah offered the land free of charge. Yet, David's response resounds through history, stating that he will not offer to God sacrifices that cost him nothing. This highlights a powerful principle about true devotion: when we give of ourselves, it’s a meaningful expression of love and worship.

Moreover, this moment echoes long-standing biblical themes where choice, sacrifice, and divine directions intertwine, impacting the course of history for generations to follow. The temple that would rise from this threshing floor isn’t merely a building; it embodies mankind’s striving for connection with the divine, rooted in devotion, sacrifice, and community.