Rashi on Genesis 42:12/רש"י על בראשית מ״ב:י״ב

1כי ערות הארץ באתם לראות BUT TO SEE THE NAKEDNESS OF THE LAND YE ARE COME — I still insist that you are spies, for what you have just said bears this out for you have entered by ten different gates of the city; why did you not all enter by the same gate if you are really brothers and travelled together? (Genesis Rabbah 91:6).