One who is proficient in the Qur'an is associated with the noble, upright, recording angels; and he who falters in it, and finds it difficult for him, will have two rewards.  

قَالَ رَسُولُ اللَّهِ ﷺ الْمَاهِرُ بِالْقُرْآنِ مَعَ السَّفَرَةِ الْكِرَامِ الْبَرَرَةِ وَالَّذِي يَقْرَأُ الْقُرْآنَ وَيَتَتَعْتَعُ فِيهِ وَهُوَ عَلَيْهِ شَاقٌّ لَهُ أَجْرَانِ  

" He who finds it hard (to recite the Qur'an) will have a double reward."  

وَقَالَ فِي حَدِيثِ وَكِيعٍ وَالَّذِي يَقْرَأُ وَهُوَ يَشْتَدُّ عَلَيْهِ لَهُ أَجْرَانِ