פּירוש אויף בראשית 41:36

והיה האכל — means AND THE FOOD that is stored up SHALL BE AS ANY other DEPOSIT (פקדון) that is held in reserve for the maintenance of the people of the land.

AND THE FOOD SHALL SERVE AS A RESERVE FOR THE LAND. Joseph said that the food should be kept in reserve under the charge of Pharaoh’s officers for the needs of the land during the seven years of famine, and they should not be used for other purposes lest the land be consumed by the famine just as the cows in the dream did not die on account of their leanness.

לשבע שני הרעב, "for the seven years of famine." First of all Egypt would provide a reserve for itself; as a secondary consideration they would serve as the pool other countries i.e. הארץ could draw on. Joseph added the consideration that the rest of the earth should not starve to death.