Narrated by Sayyidah Aisha (may Allah be pleased with her) that the Messenger of Allah (peace and blessings of Allah be upon him) heard a reciter reciting the Qur'an in the mosque at night, so he said: May Allah have mercy on this man, he reminded me of such and such verses which I had left out from such and such surahs.

Sayyiduna Abdullah bin Umar (may Allah be pleased with them) narrated that the Messenger of Allah (peace and blessings be upon him) said: The example of the one who has memorized the Qur'an is like the owner of a camel tied with a rope; if he keeps watch over it, he will be able to keep it, otherwise it will break the rope and run away.

Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) narrated that the Prophet Muhammad (peace and blessings be upon him) said: It is very bad for a person to say, "I forgot such and such verse," rather he should say, "I was made to forget." And continue reciting the Noble Qur'an, for its slipping away from the hearts of people is swifter than the escape of a camel.

Sayyiduna Abu Musa (may Allah be pleased with him) narrated that the Prophet (peace and blessings of Allah be upon him) said: Hold fast to the recitation of the Qur'an. By Him in Whose hand is my soul, it slips away faster than a camel that breaks its rope and runs away.