Genesis 42:18-20

Now Joseph said to them on the third day, “Do this and [you may] live, for I fear God: if you are honest men, let one of your brothers be confined in your [place here in] prison; but as for the rest of you, go, carry grain for the famine in your households, but bring your youngest brother to me, so your words will be verified and you will not die.” And they did so.