NET

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!”

Darby

16 Send one of you, that he may fetch your brother, but ye shall be imprisoned, and your words shall be put to the proof, whether the truth is in you; and if not, as Pharaoh lives, ye are spies.

KJV

16 Send one of you, and let him fetch your brother, and ye shall be kept in prison, that your words may be proved, whether [there be any] truth in you: or else by the life of Pharaoh surely ye [are] spies.