‘Then they acted hurriedly and every man took his sack to the ground, and every man opened his sack. And he searched and began at the eldest and finished at the youngest, and the cup was found in Benjamin's sack.'
The search is described. They act with the speed of the innocent and each opens his sack. The silver found in each sack is passed over without comment. The servant is not interested in it, he knows exactly what he is looking for and where to find it. The brothers, watching in a daze are mute. They have become used to finding silver in their sacks. Perhaps, as they see it, it also begins to dawn on them that the cup will also be found. They know now that they are simply the victims of a determined effort to destroy them.
The writer balances his work well. To comment on the silver would be to draw out the situation too much and to overload the narrative. The servant has already previously accepted that any silver in their sacks comes from God (Genesis 43:23). No one pretends it is important. All know that what matters is the silver cup. That is a different matter. And everyone but the brothers know where it is.
So the servant proceeds with his search. It is all really a charade. He knows exactly where to find it, he put it there himself. And at length he produces it from Benjamin's sack.