Sforno on Genesis 26:3/ספורנו על בראשית כ״ו:ג׳

1גור בארץ הזאת, I want you to stay in this country,

2ואהיה עמך ואברכך and even though there is presently a shortage of grazing land, if you stay where I tell you to your livestock will prosper.

3ואברכך, I will bless you both in money and livestock, on condition that you remain in this country.

4The reason is that כי לך ולזרעך אתן את כל הארצות האל והקימותי את השבועה, the reason I tell you all this is because here I will keep My oath to Avraham your father to give him and his descendants this land. While you will reside in this land you will be treated like a prince among them. You will acquire title to this land thanks to your lengthy unbroken residence on it.