Genesis 42:6-17

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.” Joseph said to them, “It is as I said to you, you are spies. In this way you shall be tested: by the life of Pharaoh, you shall not leave this place unless your youngest brother comes here! Send one of you [back home], and let him bring your brother [here], while [the rest of] you remain confined, so that your words may be tested, [to see] whether there is any truth in you [and your story]; or else, by the life of Pharaoh, certainly you are spies.” Then Joseph put them all in prison for three days.