Warning against forgetting the Qur'an

Q 6: A person memorized five Juz’s (a Juz’ equals a 30th of the Qur’an), then because of his heavy work load, he did not revise the portions he memorized for a very long period of time until he forgot all that he had memorized. What is the ruling on such a person? Did he commit a sin by doing this? Are there any Hadiths that issue stern warnings for people like him?

A: Such a person should be advised and encouraged to relearn the Qur’an, perhaps he may restore his past knowledge of the whole Qur’an, recite it, ponder on its meanings, and act according to its teachings. He should also be warned against the negative result of excessively indulging in worldly affairs that keep him away from learning his religion. However, the Hadith that warns against memorizing then forgetting the Qur’an is Da‘if (weak).May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.