창세기 41:46의 주석

בן שלושים, and old enough to assume the burden of high office.

ויעבר בכל ארץ מצרים. In order to supervise the storage facilities in the cities and to organize matters. We find the prophet Samuel as traveling the length and breadth of the country instead of waiting for the people to come to him in Samuel I 7,16, וסבב בית אל...והמצפה, “and he made the rounds (annually), starting at Bet El and finishing at Mitzpah, his home.”

ויעבור בכל ארץ מצרים, he traversed the whole land of Egypt. This was in order to familiarise himself with all the fields, to gather information about where to establish silos, etc.