One of the things that got Joseph in trouble was his dreams, the ones that indicated his brothers and even his parents would bow to him. As the famine spreads across the region and drags on for what Joseph knew would be years, his family was bound to show up sooner or later.

Note: if you read a translation that says corn, or ears of corn in chapter 41, that is not necessarily wrong. Corn used to be a general term for all grain. Maize was indigenous to North America, the Egyptians did not grow what we call corn today.