The brothers standing before the ruler of Egypt face a harsh and piercing cross-examination. Their plea of innocence falls on deaf ears as Joseph uses the very details of their arrival to build a case against them.
The brothers present themselves as a simple, innocent family seeking food, but Joseph completely rejects this defense. He dismisses their story as a fabricated cover, accusing them of being a group of conspirators who have banded together with the shared goal of espionage [ספורנו, בכור שור, ביאור שטיינזלץ].
The primary approach among commentators is that Joseph's ultimate proof relies on the specific manner in which the brothers entered the city. Anticipating the arrival of foreigners, he had established a strict registration system at the borders, requiring every person entering the country to record their name and their father's name. Upon reviewing the collected ledgers, Joseph discovered that ten different men had entered through ten separate gates, yet all were registered as the sons of the same man, Jacob [מזרחי, שפתי חכמים, חזקוני]. This fact serves as his crushing argument: if they were truly the sons of one man on a peaceful mission, they should have arrived together through a single entrance [רש״י, גור אריה, ביאור יש״ר]. Even if the brothers were to argue that they separated to avoid drawing unwanted attention, their coordinated regrouping deep inside the city proves that this was not a chance encounter, but a carefully planned infiltration [כלי יקר].
The accusation centers on the claim that they have come to uncover the country's weak, unfortified points in order to conquer it. Joseph points out that their own defense, the fact that they are a large group of brothers, actually deepens the suspicion against them. While a single spy might be sent to quietly assess soil and agricultural conditions, spies tasked with finding military vulnerabilities face constant danger. Therefore, military spies travel in large, capable groups of fighters who can protect themselves and battle their way out if discovered [מלבי״ם]. Furthermore, even if they are not professional spies, the severe famine ravaging Canaan drives desperate people to commit crimes just to survive. This reality makes it highly plausible that they arrived looking for vulnerable areas to attack and raid for food [העמק דבר].
What unfolds is a precise legal interrogation. Joseph questions them extensively about their origins and family structure [ביאור יש״ר], actively using their answers to corner them. He challenges the logic of their story, asking how it is possible for an entire family of sons to leave home without a single one remaining behind to protect their elderly father [רשב״ם]. Ultimately, this harsh questioning and heavy suspicion serve a hidden purpose. Joseph is testing their honesty, carefully extracting vital information about his younger brother, Benjamin, and setting the stage to evaluate their true character and their feelings toward the brother they lost long ago [אלשיך].