Now when they returned to their father, they said: “O our father! No more measure of grain shall we get (unless we take our brother): So send our brother with us, that we may get our measure; and we will indeed take every care of him.”
On their return they no doubt told Jacob all that
had transpired. But to beg Benjamin of him was no easy
matter, as Jacob did not trust them and had no cause to
trust them after their treatment of Joseph, So they use
the argument of urgent necessity for all it is worth.
Yusuf Ali, Abdullah. Translation and Commentary of the Quran. (Surah 12 verse 63). Microsoft Word – 012 Yusuf.doc (quran4u.com)