The Prophet ﷺ heard a reciter reciting, the Qur'an in the mosque at night. The Prophet ﷺ said, "May Allah bestow His Mercy on him, as he has remind ed me of such-and-such Verses of such and-such Suras, which I missed!"  

سَمِعَ النَّبِيُّ ﷺ قَارِئًا يَقْرَأُ مِنَ اللَّيْلِ فِي الْمَسْجِدِ فَقَالَ يَرْحَمُهُ اللَّهُ لَقَدْ أَذْكَرَنِي كَذَا وَكَذَا آيَةً أَسْقَطْتُهَا مِنْ سُورَةِ كَذَا وَكَذَا  

Messenger of Allah ﷺ said, "The example of the person who knows the Qur'an by heart is like the owner of tied camels. If he keeps them tied, he will control them, but if he releases them, they will run away."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِنَّمَا مَثَلُ صَاحِبِ الْقُرْآنِ كَمَثَلِ صَاحِبِ الإِبِلِ الْمُعَقَّلَةِ إِنْ عَاهَدَ عَلَيْهَا أَمْسَكَهَا وَإِنْ أَطْلَقَهَا ذَهَبَتْ  

The Prophet ﷺ said, "It is a bad thing that some of you say, 'I have forgotten such-and-such verse of the Qur'an,' for indeed, he has been caused (by Allah) to forget it. So you must keep on reciting the Qur'an because it escapes from the hearts of men faster than camel do."  

قَالَ النَّبِيُّ ﷺ بِئْسَ مَا لأَحَدِهِمْ أَنْ يَقُولَ نَسِيتُ آيَةَ كَيْتَ وَكَيْتَ بَلْ نُسِّيَ وَاسْتَذْكِرُوا الْقُرْآنَ فَإِنَّهُ أَشَدُّ تَفَصِّيًا مِنْ صُدُورِ الرِّجَالِ مِنَ النَّعَمِ  

The Prophet ﷺ said, "Commit yourself to the Qur'an, for by Him in whose Hand is my soul, it is surely more prone to break away than a camel in its bind.  

عَنِ النَّبِيِّ ﷺ قَالَ تَعَاهَدُوا الْقُرْآنَ فَوَالَّذِي نَفْسِي بِيَدِهِ لَهُوَ أَشَدُّ تَفَصِّيًا مِنَ الإِبِلِ فِي عُقُلِهَا