Imam Al-Nawawi’s Riyad-us-Saliheen
Chapter 181
Warning against forgetting the Qur’an
1002. Abu Musa Al-Ash`ari (May Allah be pleased with him) reported: The Prophet (sallallaahu alayhi wa sallam) said, “Read the Qur’an regularly. By the One in Whose Hand Muhammad’s soul is, it escapes from memory faster than a camel does from its tying ropes.”
[Al-Bukhari and Muslim].
1003. Ibn `Umar (May Allah be pleased with them) reported: The Messenger of Allah (sallallaahu alayhi wa sallam) said: “The parable of one who knows the Qur’an by heart is as the parable of an owner of hobbled camel. If he remains vigilant, he will retain it; and if he neglects it, it will go away.”
[Al-Bukhari and Muslim].
AbdurRahman.Org 