﴿ وَكَذَٰلِكَ مَكَّنَّا لِيُوسُفَ فِى ٱلْأَرْضِ يَتَبَوَّأُ مِنْهَا حَيْثُ يَشَآءُ ۚ نُصِيبُ بِرَحْمَتِنَا مَن نَّشَآءُ ۖ وَلَا نُضِيعُ أَجْرَ ٱلْمُحْسِنِينَ ﴾

“And thus We established Joseph securely in the land [of Egypt]: he had full mastery over it, [doing] whatever he willed. [Thus do] We cause Our grace to alight upon whomever We will; and We do not fail to requite the doers of good.”

Please check ayah 12:57 for complete tafsir.