Sforno on Genesis 42:11/ספורנו על בראשית מ״ב:י״א

1כלנו בני איש אחד יחנו, if we were spies we would have to be in the employ of some king. No king would select as his spies all members of the same family. The only reason why we arrived together is because we are all members of the same family.

2כנים אנחנו, not only are we 100% above board in all our dealings, but

3לא היו עבדיך מרגלים, we have never been spies in the past either, and there is no reason at all of suspecting us to be spies now.