Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
tabarani:8810 – Muḥammad b. al-Naḍr al-Azdī > Muʿāwiyah b. ʿAmr > Zāʾidah > Manṣūr > ʿAbd

[Machine] Abdullah said, "Indeed, I believe that on the day he died, nine-tenths of knowledge was taken away with him. And I believe that if the knowledge of Omar was placed in one scale of the balance and the knowledge of those who came after him in the other scale, the knowledge of Omar would outweigh theirs."  

الطبراني:٨٨١٠ – حَدَّثَنَا مُحَمَّدُ بْنُ النَّضْرِ الْأَزْدِيُّ ثنا مُعَاوِيَةُ بْنُ عَمْرٍو ثنا زَائِدَةُ ثنا مَنْصُورٌ قَالَ قَالَ

عَبْدُ اللهِ «إِنِّي لَأَحْسِبُ عُمَرَ قَدْ رُفِعَ مَعَهُ يَوْمَ مَاتَ تِسْعَةُ أَعْشَارِ الْعِلْمِ وَإِنِّي لَأَحْسِبُ عَلْمَ عُمَرَ لَوْ وُضِعَ فِي كِفَّةِ الْمِيزَانِ وَعَلْمُ مَنْ بَعْدَهُ لَرَجَحَ عَلَيْهِ عَلْمُ عُمَرَ ؓ »  

See similar narrations below:

Collected by Ṭabarānī
tabarani:8808 – Muḥammad b. al-Naḍr al-Azdī > Muʿāwiyah b. ʿAmr > Zāʾidah > al-Aʿmash > Shaqīq > ʿAbd

[Machine] Abdullah said, "By Allah, I believe that the knowledge of Umar, if it were to be placed in one scale of the balance and the knowledge of all the living people of the earth were to be placed in the other scale, the knowledge of Umar would outweigh them." Sulaiman said, "So I mentioned it to him (Umar), and he said, 'I believe that the knowledge of Umar has taken away nine-tenths of the knowledge.'"  

الطبراني:٨٨٠٨ – حَدَّثَنَا مُحَمَّدُ بْنُ النَّضْرِ الْأَزْدِيُّ ثنا مُعَاوِيَةُ بْنُ عَمْرٍو ثنا زَائِدَةُ ثنا الْأَعْمَشُ عَنْ شَقِيقٍ قَالَ قَالَ

عَبْدُ اللهِ «وَاللهِ إِنِّي لَأَحْسِبُ عِلْمَ عُمَرَ لَوْ وُضِعَ فِي كِفَّةِ الْمِيزَانِ وَوُضِعَ سَائِرُ أَحْيَاءِ أَهْلِ الْأَرْضِ فِي كِفَّةِ الْمِيزَانِ لَرَجَحَ عَلَيْهِ عَلْمُ عُمَرَ ؓ » قَالَ سُلَيْمَانُ فَذَكَرْتُهُ فَقَالَ لَقَدْ قَالَ عَبْدُ اللهِ أَفْضَلَ مِنْ ذَلِكَ قَالَ «إِنِّي لَأَظُنُّ عُمَرَ قَدْ ذَهَبَ بِتِسْعَةِ أَعْشَارِ الْعِلْمِ»