وَلَمَّا دَخَلُوا۟ مِنْ حَيْثُ أَمَرَهُمْ أَبُوهُم مَّا كَانَ يُغْنِى عَنْهُم مِّنَ ٱللَّهِ مِن شَىْءٍ إِلَّا حَاجَةً فِى نَفْسِ يَعْقُوبَ قَضَىٰهَا ۚ وَإِنَّهُۥ لَذُو عِلْمٍ لِّمَا عَلَّمْنَٰهُ وَلَٰكِنَّ أَكْثَرَ ٱلنَّاسِ لَا يَعْلَمُونَ
Commentary:
The desire of Jacob alluded to in this verse is the same to which reference has been made in the preceding verse viz. that they should not be suspected as spies or that, being informed by revelation that the official who distributed the grain was none other than Joseph, Jacob wanted Benjamin to meet him separately from the others.
Jacob seemed to have realized or he had possibly been informed by Divine revelation that the man in Egypt was Joseph and therefore he asked his sons to enter the town separately so that Joseph might have an opportunity to meet and talk to his brother, Benjamin, in private.