Or HaChaim on Genesis 47:1/אור החיים על בראשית מ״ז:א׳

1 אבי ואחי..…באו, "my father, my brothers, etc., have arrived. Joseph meant: "in accordance with your instructions." והנם בארץ גשו, "and here they are in the province of Goshen." "Just as you have said when you said: "I will give you the best part of the country (45,18)." As far as cattle is concerned the province of Goshen was the best part of Egypt. We find, however, that when the brothers enjoyed an audience with Pharaoh that they did not refer to what Joseph had told them about Pharaoh's promise; rather they pleaded that inasmuch as they had a lot of cattle they would appreciate it if they were allowed to settle in Goshen as it provided grazing land for their cattle.