Genesis 42:5-13

So the sons of Israel came [to Egypt] to buy grain along with the others who were coming, for famine was in the land of Canaan also. Now Joseph was the ruler over the land, and he was the one who sold [grain] to all the people of the land; and Joseph’s [half] brothers came and bowed down before him with their faces to the ground. When Joseph saw his brothers he recognized them, but [hiding his identity] he treated them as strangers and spoke harshly to them. He said to them, “Where have you come from?” And they said, “From the land of Canaan, to buy food.” Joseph recognized his brothers, but they did not recognize him. Joseph remembered the dreams he had dreamed about them, and said to them, “You are spies; you have come [with a malicious purpose] to observe the undefended parts of our land.” But they said to him, “No, my lord, for your servants have [only] come to buy food. We are all the sons of one man; we are honest men, your servants are not spies.” Yet he said to them, “No, you have come to see the undefended parts of our land.” But they said, “Your servants are twelve brothers [in all], the sons of one man in the land of Canaan; please listen: the youngest is with our father today, and one is no longer alive.”