The Most High - said

It is recommended for every Believing man and woman to recite the Book of Allah often, with due contemplation and understanding. This may be done by using a copy of the Qur'aan or from one's memory. Allaah - the Most High - said: "This is a Book which We have sent down to you, full of blessings, that you may ponder over its Verses, and that men of understanding may remember." [Surah Saad 38:29]. And: "Indeed those who recite the Book of Allaah and offer the Prayer perfectly and spend in charity out of what We have provided for them - secretly and openly - hope for a sure trade-gain that will never perish. That He may pay the their wages in full and give them even more out of His Grace. Indeed, He is Oft-Forgiving, ready to appreciate good deeds."

[Surah Fatir 35:29-30]