Joseph made himself strange unto his brethren, and he took his cup in his hand, knocked against it, and said, "By this magic cup I know that ye are spies." They replied, "Thy servants came from Canaan into Egypt for to buy corn."

Joseph: "If it be true that ye came hither to buy corn, why is it that each one of you entered the city by a separate gate?"

The brethren: "We are ALL the sons of one man in the land of Canaan, and he bade us not enter a city together by the same gate, that we attract not the attention of the people of the place." Unconsciously they had spoken as seers, for the word ALL included Joseph as one of their number.