Genesis 42:34

and bring your youngest brother unto me; then shall I know that ye are no spies, but that ye are true men; so will I deliver you your brother, and ye shall traffic in the land, have the right to trade, to buy and sell in the country. Thus the brethren gave their father a complete account of the strange happenings which had befallen them on their journey; and yet, there was missing a frank confession of their great sin. What they had confessed to one another they did not yet dare to tell their father. It was necessary to employ still sterner measures to reach that point.