رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 1003
The Book of Virtues
Warning against forgetting the Qur'an
وَعَنْ اِبْنِ عُمَرَ رَضِيَ اَللَّهُ عَنْهُمَا أَنَّ رَسُولَ اَللَّهِ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ قَالَ: إِنَّمَا مَثَلُ صَاحِبِ الْقُرْآنِ كَمَثَلِ الإِبِلِ الْمُعَقَّلَةِ، إِنْ عَاهَدَ عَلَيْهَا أَمْسَكَهَا، وَإِنْ أَطْلَقَهَا، ذَهَبَتْ مُتَّفَقٌ عَلَيْهِ.
Ibn 'Umar (May Allah be pleased with them) reported: The Messenger of Allah (ﷺ) 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].
Riyad as-Salihin, 1003