Allah says, when Yusuf's brothers opened their bags, they found their merchandise inside them, for Yusuf had ordered his servants to return it to their bags. When they found their merchandise in their bags,
(They said: "O our father! What (more) can we desire..."), what more can we ask for,
(This, our money has been returned to us;) Qatadah commented (that they said), "What more can we ask for, our merchandise was returned to us and the `Aziz has given us the sufficient load we wanted" They said next,
(so we shall get (more) food for our family,), `if you send our brother with us the next time we go to buy food for our family,'
(and we shall guard our brother and add one more measure of a camel's load.) since Yusuf, peace be upon him, gave each man a camel's load of corn.
(This quantity is easy (for the king to give).) They said these words to make their case more appealing, saying that taking their brother with them is worth this gain,
(He Ya`qub (Jacob) said: "I will not send him with you until you swear a solemn oath to me in Allah's Name..."), until you swear by Allah with the strongest oath,
(that you will bring him back to me unless you are yourselves surrounded (by enemies)), unless you were all overwhelmed and were unable to rescue him,
(And when they had sworn their solemn oath), he affirmed it further, saying,
(Allah is the Witness to what we have said.) Ibn Ishaq commented, "Ya`qub did that because he had no choice but to send them to bring necessary food supplies for their survival. So he sent Binyamin with them."