Mishkat al-Masabih 8 The Excellent Qualities of the Qur’an كتاب فضائل القرآن 90

وَعَنْ سَعْدِ بْنِ عُبَادَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسلم: «مَا من امْرِئٍ يَقْرَأُ الْقُرْآنَ ثُمَّ يَنْسَاهُ إِلَّا لَقِيَ اللَّهَ يَوْمَ الْقِيَامَةِ أَجْذَمَ» . رَوَاهُ أَبُو دَاوُدَ والدارمي

Sā‘d b. Ubāda reported God’s messenger as saying, “Every man who recites the’ Qur’ān and then forgets it* will meet God on the day of resurrection in a maimed condition.” *This has been explained as referring to one who has learned the Qur’ān by heart and later forgets it, or neglects to recite it. Abū Dāwūd and Dārimī transmitted it.