Genesis 42:15

By this you shall be tested : by the life of Pharaoh , you shall not go from this place unless your youngest brother comes here .

And this is how you will be tested: As surely as Pharaoh lives, you will not leave this place unless your youngest brother comes here.

Hereby ye shall be proved : By the life of Pharaoh ye shall not go forth hence, except your youngest brother come hither.