Genesis 42:3-6

And Joseph's ten brethren went down to buy corn in Egypt. But Benjamin, Joseph's brother, Jacob sent not with his brethren; for he said, Lest peradventure mischief befall him. And the sons of Israel came to buy corn among those that came: for the famine was in the land of Canaan. And Joseph was the governor over the land, and he it was that sold to all the people of the land: and Joseph's brethren came, and bowed down themselves before him with their faces to the earth.