Genesis 42:18

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

Send one of you, and let him get your brother, and you shall be bound, that your words may be tested, whether there is truth in you, or else by the life of Pharaoh surely you are spies.”

He put them all together into custody for three days.

If you are honest men, then let one of your brothers be bound in your prison; but you go, carry grain for the famine of your houses.

Bring your youngest brother to me; so will your words be verified, and you won’t die.”

They did so.

They said to one another, “We are certainly guilty concerning our brother, in that we saw the distress of his soul, when he begged us, and we wouldn’t listen. Therefore this distress has come upon us.”