عن أبي موسى رضي الله عنه عن النبي صلى الله عليه وسلم قال ‏"‏تعاهدوا هذا القرآن فوالذي نفس محمد بيده لهو أشد تفلتًا من الإبل في عقلها‏"‏‏.‏ ‏(‏‏(‏متفق عله‏)‏‏)‏‏.‏

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].