14 “It is just as I said,” Joseph answered. “You are spies.
15 This is how you will be tested: I swear by the name of the king that you will never leave unless your youngest brother comes here.
16 One of you must go and get him. The rest of you will be kept under guard until the truth of what you say can be tested. Otherwise, as sure as the king lives, you are spies.”
17 With that, he put them in prison for three days.
18 On the third day Joseph said to them, “I am a God-fearing man, and I will spare your lives on one condition.
19 To prove that you are honest, one of you will stay in the prison where you have been kept; the rest of you may go and take back to your starving families the grain that you have bought.
20 Then you must bring your youngest brother to me. This will prove that you have been telling the truth, and I will not put you to death.”They agreed to this