Genesis 42:6
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. 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.
Joseph was governor over Egypt, exercising authority over the grain trade and selling grain to all the people of the land during the famine. His brothers came with the crowd of buyers to buy food and corn, and bowed down before him with their faces to the earth in submission. They did not recognize him because his name and appearance had changed, but he knew they were his brothers and acted as a stranger toward them. He spoke roughly to them, asked where they came from, and accused them of being spies come to see the nakedness of the land, leading into his testing of them and supplying them with grain.
Their bowing fulfilled his strange dreams of dominion over them, which he remembered when he saw them. The brothers had acted to take a sure course to prevent the dreams from coming true by selling him into slavery. They had even purposed to kill him and then sold him as a slave to keep him from becoming greater than themselves and to make fulfillment impossible. The Lord controlled events and overruled their cruel course so that the very course they pursued to frustrate fulfillment brought it about. By being sold Joseph became a saviour to his father's family, but God's providence in this did not lessen the brothers' guilt. This illustrates how Christ, by being rejected and murdered by his own people when his enemies sought his death, became Redeemer of mankind, Saviour of the fallen race, and ruler over the whole world, without lessening the guilt of his enemies.