أَخْبَرَنَا مُحَمَّدُ بْنُ أَحْمَدَ بْنِ أَبِي خَلَفٍ ، حَدَّثَنَا أَنَسُ بْنُ عِيَاضٍ ، حَدَّثَنِي عُبَيْدُ اللَّهِ بْنُ عُمَرَ ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ عَلَيْه رضْوَانُ اللَّهِ تَعَالَى، قَالَ لِعَبْدِ اللَّهِ بْنِ سَلَامٍ رَضِيَ اللهُ عَنْهُ :" مَنْ أَرْبَابُ الْعِلْمِ؟ "، قَالَ : " الَّذِينَ يَعْمَلُونَ بِمَا يَعْلَمُونَ، قَالَ : فَمَا يَنْفِي الْعِلْمَ مِنْ صُدُورِ الرِّجَالِ؟، قَالَ : الطَّمَعُ "

Muhammad bin Ahmad bin Abi Khalaf told us, Anas bin Iyadh told us, Ubayd Allah bin Umar told me, that Omar bin Al-Khattab has Ridwan upon him. God Almighty said to Abdullah bin Salam, may God be pleased with him: “Who are the masters of knowledge?” He said: “Those who work according to what they know.” He said: What is negated? Knowledge from the breasts of men? He said: Greed.