 ١١ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ خَالِدٍ الْبَرْقِيِّ عَنْ بَعْضِ أَصْحَابِهِ عَنْ أَبِي سَعِيدٍ الْخَيْبَرِيِّ عَنِ الْمُفَضَّلِ بْنِ عُمَرَ قَالَ قَالَ لِي أَبُو عَبْدِ الله (عَلَيْهِ السَّلام) اكْتُبْ وَبُثَّ عِلْمَكَ فِي إِخْوَانِكَ فَإِنْ مِتَّ فَأَوْرِثْ كُتُبَكَ بَنِيكَ فَإِنَّهُ يَأْتِي عَلَى النَّاسِ زَمَانُ هَرْجٍ لا يَأْنَسُونَ فِيهِ إِلا بِكُتُبِهِمْ.
 11. A number of our people has narrated from Ahmad ibn Muhammad ibn Khalid al-Barqi from certain persons of his people from abu Sa‘id al-Khaybari from al-Mufaddal ibn ‘Umar who has said the following. “Abu ‘Abdallah  said, ‘You must write down (Hadith) and spread your knowledge among your brethren. If you will die your children will inherit your books. A time will come when people will face chaos and they will find no comfort but with their books.’”