This subject has been taken up in the succeeding verse where it is said that the sons carried out the instructions of their father and entered the city from different gates. When they did so, the desire of their father stood fulfilled - though, this measure taken by him could not avert anything already destined by Allah. But, as for the paternal love and concern of Sayyidna Ya` qub (علیہ السلام) for his sons, this he did demonstrate to his heart's content.
Towards the end of the verse, Sayyidna Ya` qub (علیہ السلام) has been praised in the following words: وَإِنَّهُ لَذُو عِلْمٍ لِّمَا عَلَّمْنَاهُ وَلَـٰكِنَّ أَكْثَرَ النَّاسِ لَا يَعْلَمُونَ (He was a man of knowledge, because We had taught him, but most of the people do not know - 68). It means that his knowledge was not acquired. It did not come from books. Instead, it was directly a Divine gift. Therefore, he did employ physical means, something legally required, and commendable. But, he did not place his total trust in it. However, the truth is that most of the people do not know the reality behind it. Thus unaware, they would fall in doubts about Sayyidna Ya` qub (علیہ السلام) thinking that the employment of these means did not match the station of a prophet.
Some commentators have said that the first word: عِلم : knowledge) means acting in accordance with the dictate of ` ilm (knowledge). The translation in this case will be: "He was a man of action according to the knowledge We gave him". Therefore, he did not place his trust in material means, in fact, it was Allah alone he relied on and trusted in.'