The Prophet ﷺ said, "Such a person as recites the Qur'an and masters it by heart, will be with the noble righteous scribes (in Heaven). And such a person exerts himself to learn the Qur'an by heart, and recites it with great difficulty, will have a double reward."  

عَنِ النَّبِيِّ ﷺ قَالَ مَثَلُ الَّذِي يَقْرَأُ الْقُرْآنَ وَهْوَ حَافِظٌ لَهُ مَعَ السَّفَرَةِ الْكِرَامِ الْبَرَرَةِ وَمَثَلُ الَّذِي يَقْرَأُ الْقُرْآنَ وَهْوَ يَتَعَاهَدُهُ وَهْوَ عَلَيْهِ شَدِيدٌ فَلَهُ أَجْرَانِ