Genesis 42:6-10

Now Joseph was governor over Egypt. He was the one who sold the grain to people who came to buy it. So Joseph’s brothers came to him and bowed facedown on the ground before him. When Joseph saw his brothers, he knew who they were, but he acted as if he didn’t know them. He asked unkindly, “Where do you come from?” They answered, “We have come from the land of Canaan to buy food.” Joseph knew they were his brothers, but they did not know who he was. And Joseph remembered his dreams about his brothers bowing to him. He said to them, “You are spies! You came to learn where the nation is weak!” But his brothers said to him, “No, my master. We come as your servants just to buy food.