The banquet in Egypt takes a surprising turn when the brothers find themselves seated in a perfect, astonishing arrangement. The primary approach among commentators is that Joseph personally directed them to sit in this precise sequence. However, another perspective suggests that the brothers simply sat down on their own accord, following their usual family custom [רא״ש, תולדות יצחק, הדר זקנים, דעת זקנים, חזקוני]. The order itself was highly specific. It was not merely the oldest and the youngest placed at the extremes; rather, every single brother was seated in his exact relative position according to his age [הכתב והקבלה]. Other commentators suggest the arrangement went beyond strict chronology to reflect family dynamics, such as grouping the sons by their respective mothers or placing Judah in a position of honor alongside the firstborn due to his leadership role [העמק דבר, חתם סופר, משכיל לדוד].
To explain how Joseph orchestrated this seating, some commentators describe a theatrical scene involving his silver goblet. Joseph struck the cup and called out the brothers to sit in groups according to their mothers. When it came to the youngest, Benjamin, Joseph announced that since the boy had no mother and he himself had no mother, Benjamin should sit beside him [רש״י, רד״ק, רבנו בחיי]. Since the older brothers' mother had also passed away by this time, this statement requires clarification. The distinction was that Benjamin was orphaned at the very moment of his birth and grew up entirely without a mother, whereas the others lost theirs only as adults [גור אריה, שפתי חכמים]. Alternatively, Joseph meant that Benjamin lacked a full brother from the same mother [לבוש האורה], or perhaps Joseph simply assumed that his father's other wives were still alive [חזקוני].
Faced with this situation, the brothers looked at one another in complete wonder and amazement [שד״ל]. If Joseph had indeed arranged the seating, their shock stemmed from his impossible knowledge. The brothers had all been born within a brief span of just seven years. Now, as mature adults, there were no visible physical differences to indicate their ages. For a foreign ruler to know their exact birth order seemed utterly miraculous [רשב״ם, רד״ק, ביאור שטיינזלץ, פענח רזא, בכור שור]. Others attribute their amazement directly to the perceived magic of the goblet. While the Egyptians were renowned for astrology, the brothers believed their host was utilizing an unfamiliar, mystical art of extracting hidden speech from the sounds of the struck cup, deciphering information that only a master could understand [רבנו בחיי].
On the other hand, according to the view that the brothers had seated themselves naturally, their astonishment had nothing to do with the seating arrangement. Instead, they were bewildered by the peculiar behavior of their host. Seeing that he ate neither with the Egyptians nor with them, they wondered among themselves about the identity of this strange man who was neither Hebrew nor Egyptian, yet sat and dined completely alone [רא״ש, תולדות יצחק, הדר זקנים, דעת זקנים, חזקוני].