And the one from Egypt who bought him said to his wife, "Make his residence comfortable. Perhaps he will benefit us, or we will adopt him as a son." And thus, We established Joseph in the land that We might teach him the interpretation of events. And Allah is predominant over His affair, but most of the people do not know.  

وَقَالَ الَّذِي اشْتَرَاهُ مِنْ مِصْرَ لِامْرَأَتِهِ أَكْرِمِي مَثْوَاهُ عَسَىٰ أَنْ يَنْفَعَنَا أَوْ نَتَّخِذَهُ وَلَدًا ۚ وَكَذَٰلِكَ مَكَّنَّا لِيُوسُفَ فِي الْأَرْضِ وَلِنُعَلِّمَهُ مِنْ تَأْوِيلِ الْأَحَادِيثِ ۚ وَاللَّهُ غَالِبٌ عَلَىٰ أَمْرِهِ وَلَٰكِنَّ أَكْثَرَ النَّاسِ لَا يَعْلَمُونَ  

And when Joseph reached maturity, We gave him judgment and knowledge. And thus We reward the doers of good.  

وَلَمَّا بَلَغَ أَشُدَّهُ آتَيْنَاهُ حُكْمًا وَعِلْمًا ۚ وَكَذَٰلِكَ نَجْزِي الْمُحْسِنِينَ