Genesis 42:16

42:16 One of you must go and get your brother, while the rest of you remain in prison. In this way your words may be tested to see if you are telling the truth. If not, then, as surely as Pharaoh lives, you are spies!”

Genesis 44:17

44:17 But Joseph said, “Far be it from me to do this! The man in whose hand the cup was found will become my slave, but the rest of you may go back to your father in peace.”