King David loved the Lord so much he asked the Lord if he could build a permanent House for Him – the first Temple. In His reply through the prophet Nathan, God established an eternal covenant promise with David. Even though David would not be the one to build the House, God promised David his son would reign as king, and he would build it.
But then God greatly expands the scope and reach of His unconditional promise: that one of David’s descendants would one day reign as King on a Throne and over a Kingdom that would endure FOREVER.
No earthly king could wear these sandals. This could only be fulfilled by Jesus – the Messiah – the Eternal Son of God.