וַיֵּ֧שֶׁב יִשְׂרָאֵ֛ל בְּאֶ֥רֶץ מִצְרַ֖יִם בְּאֶ֣רֶץ גֹּ֑שֶׁן וַיֵּאָחֲז֣וּ בָ֔הּ וַיִּפְר֥וּ וַיִּרְבּ֖וּ מְאֹֽד׃
And Israel dwelt in the land of Egypt, in the land of Goshen; and they got them possessions therein, and were fruitful, and multiplied exceedingly.
Rashi on Genesis
וישב ישראל בארץ מצרים AND ISRAEL ABODE IN THE LAND OF EGYPT — and where in the land of Egypt? בארץ גשן IN THE LAND OF GOSHEN which is a part of the land Egypt.
Or HaChaim on Genesis
וישב ישראל בארץ מצרים, Israel dwelled in the land of Egypt, etc. Why did the Torah add that the land of Goshen is in the land of Egypt? Do we not know this already? Besides, what is the connection between the Jewish people multiplying and their dwelling in the land of Egypt?
Radak on Genesis
וישב ישראל, the term is used to describe the entire family of Yaakov, as if the Torah had written בני ישראל.