[Pooya/Ali Commentary 12:55] (see commentary for verse 3) Aqa Mahdi Puya says: To manage the treasury of a country a knowing guardian is necessary, as per this verse, therefore, for a guardian who is entrusted with the responsibility to guide the whole mankind, in all times, unto the ultimate purpose of creation, the highest degree of wisdom (referred to in Nisa: 54-the Holy Prophet and his Ahl ul Bayt) is required. Certainly the recompense of the life to come is better for those who believe and follow the right path. There was a wide spread famine in all of Arabia, Northern Africa, Syria, Iraq and Palestine. On account of Yusuf's foresight and his able administration bread was available in Egypt only. So the brothers of Yusuf also came to Egypt and called on him. He recognised them, though they did not recognise him. See verse 15. He treated them liberally. The ten brothers had come. Yusuf asked them to bring their brother, Benjamin, whom they said his (they did not say their) father had kept with him, so that they would be able to get his share also. They went back to Yaqub and asked him to send Benjamin with them so that they could bring more grain. Yaqub said he could not trust them with Benjamin after what they did to Yusuf. Yaqub knew that Yusuf was alive, so he said Allah was the best of guardians.