Is not David's throne an earthly throne?
The Bible tells us that the Lord will reign from David's throne.
6 For to us a child is born,
to us a son is given,
and the government will be on his shoulders.
And he will be called
Wonderful Counselor, Mighty God,
Everlasting Father, Prince of Peace.
7 Of the increase of his government and peace
there will be no end.
He will reign on David's throne
and over his kingdom,
establishing and upholding it
with justice and righteousness
from that time on and forever.
The zeal of the LORD Almighty
will accomplish this.
Davids throne is not an everlasting throne. Christs throne though is eternal. don't we have a physical throne being ruled on by the Lord and a spiritual throne. Once the earth is destroyed David's throne exists no more. But the Son of David will reign forever.