Or HaChaim on Genesis 41:36/אור החיים על בראשית מ״א:ל״ו

1 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.