ومن فوائد قصة يوسف: أن من دخل الإيمان قلبه، وكان مخلصاً لله في جميع أموره فإن الله يدفع عنه ببرهان إيمانه، وصدق إخلاصه من أنواع السوء والفحشاء وأسباب المعاصي ما هو جزاء لإيمانه وإخلاصه لقوله ( وَهَمَّ بِهَا لَوْلا أَنْ رَأَى بُرْهَانَ رَبِّهِ كَذَلِكَ لِنَصْرِفَ عَنْهُ السُّوءَ وَالْفَحْشَاءَ إِنَّهُ مِنْ عِبَادِنَا الْمُخْلَصِينَ ) على قراءة من قرأها بكسر اللام، ومن قرأها بالفتح، فإنه من إخلاص الله إياه، وهو متضمن لإخلاصه هو بنفسه، فلما أخلص عمله لله أخلصه الله، وخلصه من السوء والفحشاء. ( تفسير السعدي : 1 / 407 ) .Three signs of sincerity: the level of praise and slander of the public, forgetting to see business in business, and the requirement of reward work in the Hereafter. Among the benefits of Yusuf's story is that whoever enters his faith in his heart and is faithful to God in all his affairs, Allaah will pay him for proof of his faith and his sincerity of the kinds of evil and indecency and the causes of sin. What is the reward for his faith and his sincerity for saying it? And the vow is that it is one of our sincere worshipers. On the reading of those who read it with the breaking of the non-believer, and the one who read it with the opening, it is from the sincerity of God, and it is included for his own sincerity. (Tafseer al-Sa'di: 1/407).