Genesis 44:1

And he commanded the steward of his house, saying, Fill the men's sacks with food, as much as they can carry, and put every man's money in his sack's mouth. The feast which Joseph had arranged may have lasted a large part of the afternoon. At its conclusion the chief steward received orders to have the sacks of the strangers filled, but with very good measure. The return of the money in this case did not belong to the test but inasmuch as it was intended to strengthen the general impression.