صحيح مسلم
Sahih Muslim
باب الْأَمْرِ بِتَعَهُّدِ الْقُرْآنِ، وَكَرَاهَةِ قَوْلِ نَسِيتُ آيَةَ كَذَا، وَجَوَازِ قَوْلِ أُنْسِيتُهَا
Chapter: The command to keep refreshing one’s knowledge of the Qur’an and that it is disliked to say I have forgotten such-and-such a verse, but it is permissible to say I have been caused to forget
Hadith 790
This hadith is listed as number 1843 in Maktaba Shamila
وحَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمٍ ، حَدَّثَنَا مُحَمَّدُ بْنُ بَكْرٍ ، أَخْبَرَنَا ابْنُ جُرَيْجٍ ، حَدَّثَنِي عَبْدَةُ بْنُ أَبِي لُبَابَةَ ، عَنْ شَقِيقِ بْنِ سَلَمَةَ ، قَالَ : سَمِعْتُ ابْنَ مَسْعُودٍ ، يَقُولُ : سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ، يَقُولُ : " بِئْسَمَا لِلرَّجُلِ ، أَنْ يَقُولَ : نَسِيتُ سُورَةَ كَيْتَ وَكَيْتَ ، أَوْ نَسِيتُ آيَةَ كَيْتَ وَكَيْتَ ، بَلْ هُوَ نُسِّيَ " .
Ibn Mas'ud reported Allah's Messenger (ﷺ) as saying: Wretched is the man who says: I forgot such and such a sura, or I forget such and such a verse, but he has been made to forget.
