Having memorized the Qur'an, the Hafiz or Hafiza must then ensure they do not forget it. To ensure perfect recall of all the learned verses requires constant practice.The memorization of the Qur'an was important to Muslims in the past and is also in the present. Yearly, thousands of students master the Qur'an and complete the book with interpretation and also memorization. The Quran is perhaps the only book, religious or secular, that has been memorized completely by millions of people.