Genesis 42:10-12

‘And they said to him, “No, my lord. It is to buy food that your servants have come. We are all sons of one man. We are true men. Your servants are no spies.” And he said to them, “No, but to see the nakedness of the land you have come.”

They desperately seek to assert their innocence and integrity, but to no avail. The great man does not believe them and again accuses them through the interpreters of coming to find out the weaknesses of the land. So with fear in their hearts they try again.