Genesis 42:32

30“The man, the lord of the land, spoke roughly with us, and took us for spies of the country.

31We said to him, ‘We are honest men. We are no spies.

32We are twelve brothers, sons of our father; one is no more, and the youngest is today with our father in the land of Canaan.’

33The man, the lord of the land, said to us, ‘By this I will know that you are honest men: leave one of your brothers with me, and take grain for the famine of your houses, and go your way.

34Bring your youngest brother to me. Then I will know that you are not spies, but that you are honest men. So I will deliver your brother to you, and you shall trade in the land.’”