Joseph recognized his brothers, but they did not recognize him. He accused them of being spies and held Simon giving the others instructions to do what in order to get Simon out of jail.
(1) Return home and bring their brother Benjamin back with them? (2) Take the food and don’t come back to Egypt? (3) Make their father return to get Simon?
ANSWER FOUND IN GENESIS 42
ANSWER:
If ye be true men, let one of your brethren be bound in the house of your prison: go ye, carry corn for the famine of your houses: But bring your youngest brother unto me; so shall your words be verified, and ye shall not die. And they did so. (Genesis 42:19-20)