‘And when Joseph saw Benjamin with them he said to the steward of his house, “Bring the men into the house, and kill and make ready, for the men will dine with me at noon.” And the men were afraid because they were brought into Joseph's house, and they said, “We have been brought in because of the silver that was returned in our sacks the first time, that he may seek occasion against us and fall on us and take us for bondmen, and our asses.” '
When Joseph sees Benjamin his heart is full and he tells his steward that he will eat with the men at noon and that he must prepare a feast. His steward is, of course, an important person in his own right. Meanwhile Joseph must continue ‘overseeing' the sale of the corn.
But when they are brought to his splendid house, well guarded by Egyptian soldiers and magnificent beyond their dreams, they are fearful as to what it means. Their minds return to the silver that had mysteriously appeared in their sacks and they remember how they had thought it was a plant. Now they are sure of it. It has been planted on them so that an excuse can be found to enslave them and take their possessions.
“Fall on us.” They have a vision of the Egyptian guards suddenly pouncing on them and carrying them off to prison.