أَخْبَرَنَا إِسْمَاعِيل بْنُ إِبْرَاهِيمَ أَبُو مَعْمَرٍ ، عَنْ أَبِي ضَمْرَةَ ، عَنْ يَحْيَى بْنِ سَعِيدٍ ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ ، قَالَ : كَتَبَ عُمَرُ بْنُ عَبْدِ الْعَزِيزِ رَحِمَهُ الله إِلَى أَبِي بَكْرِ بْنِ مُحَمَّدِ بْنِ عَمْرِو بْنِ حَزْمٍ :" أَنْ اكْتُبْ إِلَيَّ بِمَا ثَبَتَ عِنْدَكَ مِنْ الْحَدِيثِ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ، وَبِحَدِيثِ عَمْرَةَ فَإِنِّي قَدْ خَشِيتُ دُرُوسَ الْعِلْمِ وَذَهَابَهُ "

Ismail bin Ibrahim Abu Muammar told us, on the authority of Abu Damra, on the authority of Yahya bin Saeed, on the authority of Abdullah bin Dinar, he said: He wrote Omar bin Abdul Aziz, may God have mercy on him, to Abu Bakr bin Muhammad bin Amr bin Hazm: “Write to me with what is proven to you of the hadith about The Messenger of God, may God bless him and grant him peace, and according to the hadith of ‘Umrah, I feared the lessons of knowledge and its disappearance.”