Sforno on Genesis 47:30/ספורנו על בראשית מ״ז:ל׳

1ושכבתי עם אבותי, the matter of “the deceased lying with his fathers,” is the placing the bier with the deceased at the place of the eulogy, surrounded by the mourners and those eulogising him. This is why the same expression is used throughout the Book of Kings, whether describing the burial of kings, the righteous, or the wicked.

2ונשאתני ממצרים, when you will follow this procedure you will be able to carry me out of Egypt, for when the days of lying in state will have come to an end, people will no longer be in a state of sorrow over my passing, as we know from 50,4 ויעברו ימי בכיתו, and no one will protest if you will transport my remains to another country.

3אנכי אעשה כדברך, I will do this on my own, making every effort to fulfill your command.