(33) باب الأَمْرِ بِتَعَهُّدِ الْقُرْآنِ وَكَرَاهَةِ قَوْلِ نَسِيتُ آيَةَ كَذَا. وَجَوَازِ قَوْلِ أُنْسِيتُهَا
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. (RU)
Reference (RU): Sahih Muslim 790 c (RU)
In-book reference (RU): Book 6, Hadith 271 (RU)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1726 (RU)