They find Their Money returned to Their Bags
Allah says
ولما فتحوا متاعهم وجدوا بضاعتهم ردت إليهم
And when they opened their bags, they found their money had been returned to them.
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,
قالوا يا أبانا ما نبغي
They said: "O our father! What (more) can we desire...'',
what more can we ask for,
هذه بضاعتنا ردت إلينا
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,
ونمير أهلنا
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,'
ونحفظ أخانا ونزداد كيل بعير
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.
ذلك كيل يسير
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,