In this manner you shall be tested: By the life of Pharaoh, you shall not leave this place unless your youngest brother comes here.
Genesis 42:15
Surrounding context
42:14 But Joseph said to them, "It is as I spoke to you, saying, "You are spies!'
42:15 In this manner you shall be tested: By the life of Pharaoh, you shall not leave this place unless your youngest brother comes here.
42:16 Send one of you, and let him bring your brother; and you shall be kept in prison, that your words may be tested to see whether there is any truth in you; or else, by the life of Pharaoh, surely you are spies!"