[Pooya/Ali Commentary 12:93] (see commentary for verse 3) Aqa Mahdi Puya says: Far-tadda basira means (Yaqub) forwith regained his sight. It implies that he had lost his sight and then regained it. When the garment was put over Yaqub's face his eyesight was restored. He said: "Did I not tell you? I know from Allah what you do not know." The sons asked their father to pray for them that their sins be forgiven. Yaqub said: "Allah will forgive you. He is oft-forgiving and kind." When they went back to Yusuf, he gave his father and mother a place of honour, and seated them by his side on the throne; and they fell before him in homage.