Genesis 43:32-33

32The servants gave food to Joseph at his own table. The brothers sat together at a different table. And the Egyptians who ate there also sat together. The Egyptians could not eat a meal with Hebrews, because that would make the Egyptians ashamed.

33The brothers sat in a place where Joseph could see them. The servants told each of them where to sit, by their age. The oldest brother was at one end, all along to the youngest brother at the other end. The brothers were very surprised to see this.