וּשְׁלֹמֹ֕ה יָשַׁ֕ב עַל־כִּסֵּ֖א דָּוִ֣ד אָבִ֑יו וַתִּכֹּ֥ן מַלְכֻת֖וֹ מְאֹֽד׃
And Solomon sat upon the throne of David his father; and his kingdom was established firmly.
Rashi
And it will come to pass when your days are finished to go with your forefathers That is to say, do not fear that I will hasten the matter, but when your days are finished, then it will come about, and I shall raise up your seed after you. and I shall establish his kingdom And so he says of Solomon, (I Kings 2:12): “... and his kingdom was firmly established.”