It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "The rewards of my Ummah were presented to me, even the tiny speck of dirt that a man removes from the mosque; and the sins of my Ummah were presented to me, and I did not see any sin greater than that a man is given a verse or a surah of the Noble Qur'an and then he forgets it."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Ibn Jurayj (may Allah have mercy on him), from al-Zuhri (may Allah have mercy on him), from Sayyiduna Anas (may Allah be pleased with him), except Abd al-Majid (may Allah have mercy on him), and Muhammad bin Yazid al-Adami (may Allah have mercy on him) is alone in narrating it."
Muhammad bin Yazid (may Allah have mercy on him) also narrated it from Abd al-Majid (may Allah have mercy on him), from Ibn Jurayj (may Allah have mercy on him), from al-Muttalib (may Allah have mercy on him), from Sayyiduna Anas (may Allah be pleased with him).
Hadith Referenceالمعجم الأوسط / باب الميم / 6489
Hadith Gradingمحدثین:ضعيف
Hadith Takhrij«قال ابن عبد البر: ليس هذا الحديث مما يحتج به لضعفه «التمهيد لما في الموطأ من المعاني والأسانيد، ج 14، ص 135»» «قال الدارقطني: والحديث غير ثابت «العلل الواردة في الأحاديث النبوية، ج 12، ص 171»» «أخرجه ابن خزيمة فى «صحيحه» برقم: 1297، وأبو داود فى «سننه» برقم: 461، والترمذي فى «جامعه» برقم: 2916، والبيهقي فى «السنن الكبرى» برقم: 4381، وأبو يعلى فى «مسنده» برقم: 4265، والبزار فى «مسنده» برقم: 6219، وعبد الرزاق فى «مصنفه» برقم: 5977، والطبراني فى «الصغير» برقم: 547»