[Pooya/Ali Commentary 12:64] (see commentary for verse 3) Aqa Mahdi Puya says: Yaqub wanted his sons to know that their undertaking to guard Benjamin had no credibility in his opinion, as was in the case of Yusuf aforetime. On both occasions Yaqub did not trust his sons; he put his faith in Allah alone. When they unpacked their goods they found the money which the servants of Yusuf had put there on his orders, so that greed might bring them back again with Benjamin. Yaqub, a man of wisdom and experience, aware of the possible suspicions the people of Egypt might have about eleven strangers parading in the city, advised them to enter from different gates. Although they did as advised by Yaqub but it did not profit them against the plan of Allah - reunion of the whole family and shaming the ten brothers into repentance. The men of Allah are full of knowledge, not as men, but as taught by the grace of Allah. Yusuf was delighted to see Benjamin, his own brother. He told him not to worry as he was going to keep Benjamin with himself. After taking the provisions, when they were departing Yusuf asked a steward to put his own drinking silver cup in Benjamin's saddle-bag; and then it was announced that Yusuf s silver cup had been stolen. As they were about to leave a steward stopped them and searched their bags, and found the silver cup in Benjamin's bag. So he was detained. It was Allah's plan to allow Yusuf to keep his brother with himself because under the law of the land he could not detain his brother.