You must have a wird of recitation of the Mighty Book to be read every day. The least you should do is read on juz’ [one thirtieth of the Qur'an] so that you complete it once a month, and the most is to complete it every three days.

Know that great merit attaches to reciting the Qur’an, and an influence in illuminating the heart. The Messenger of God, may blessings and peace be upon him, has said: ‘The best of my nation’s devotions is the recitation of Qur’an.’ And `Ali, may God ennoble his face, has said: ‘The one who recites the Qur’an while standing in prayer recieves one hundred rewards for each letter; the one who recites it outside the prayer but in a state of ritual purity receives twenty-five rewards for each letter; and the one who recites it without ritual purity receives ten rewards for each letter.’

Beware of concentrating, while reciting, on a large amount to the exclusion of reflection and correct recitation. You must reflect and comprehend while you recite; slow, melodious recitation will assist you in this.

On Reciting the Quran