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I.e., the goods which they had bartered for wheat (Ibn Kathir): a very plausible explanation in view of the fact that barter was the most common form of trade in those ancient times.
Lit., "so that they may perceive them when they come back to their family, [and] that they may return".
Bidha'at: stock in trade; capital with which business is carried on; money-when it is used as capital for trade. It is better here to suppose that they were bartering goods for grain. Cf. xii. 19.
It was most important for Joseph's plan that they should come back. If they came back at all, they could not come without Benjamin after what he had told them. As an additional incentive to their coming back, he returns the price of the grain in such a way that they should find it in their saddle-bags when they reach home.