(21) باب التَّشْدِيدِ فِيمَنْ حَفِظَ الْقُرْآنَ ثُمَّ نَسِيَهُ
Narrated Sa'd ibn Ubadah:
The Prophet (ﷺ) said: No man recites the Qur'an, then forgets it, but will meet Allah on the Day of Judgment in a maimed condition (or empty-handed, or with no excuse).
Reference: Sunan Abi Dawud 1474
In-book reference: Book 8, Hadith 59
English translation: Book 8, Hadith 1469