Teaching the Language of the Quran to the people of the Quran.
قال ابن جرير الطبري : "عجبت لمن يقرأ القرآن وهو لا يعرف معانيه كيف يلتذ بقراءته
At-Tabari said: "I am astonished by the one who recites the Quran, while not knowing it's meaning, how can he find pleasure in his recitation?".