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What you have made up is that that throne is like a Davidic one that will be in Jerusalem.
Luke 1:31-33 (AKJV/PCE)
(1:31) And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name JESUS. (1:32) He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David: (1:33) And he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end.
Isa 9:7 (AKJV/PCE)
(9:7) Of the increase of [his] government and peace [there shall be] no end, upon the throne of David, and upon his kingdom, to order it, and to establish it with judgment and with justice from henceforth even for ever. The zeal of the LORD of hosts will perform this.
It's so simple that a child can understand it... but not a "real writer and grammar scholar".