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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
darimi:604 – Muḥammad b. Yūsuf > Sufyān > ʿUmar > Likaʿb Man Arbāb al-ʿIlm > al--Adhīn Yaʿmalūn Bimā Yaʿlamūn

[Machine] So, what caused knowledge to be removed from the hearts of the scholars? He said, "Greed."  

الدارمي:٦٠٤ – أَخْبَرَنَا مُحَمَّدُ بْنُ يُوسُفَ عَنْ سُفْيَانَ أَنَّ عُمَرَ قَالَ لِكَعْبٍ مَنْ أَرْبَابُ الْعِلْمِ؟ قَالَ «الَّذِينَ يَعْمَلُونَ بِمَا يَعْلَمُونَ» قَالَ

فَمَا أَخْرَجَ الْعِلْمَ مِنْ قُلُوبِ الْعُلَمَاءِ؟ قَالَ «الطَّمَعُ»