 ١٠ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنِ الْحَسَنِ بْنِ عَلِيِّ بْنِ فَضَّالٍ عَنِ ابْنِ بُكَيْرٍ عَنْ عُبَيْدِ بْنِ زُرَارَةَ قَالَ قَالَ أَبُو عَبْدِ الله (عَلَيْهِ السَّلام) احْتَفِظُوا بِكُتُبِكُمْ فَإِنَّكُمْ سَوْفَ تَحْتَاجُونَ إِلَيْهَا.
 10. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from al-Hassan ibn Ali ibn Faddal from ibn Bukayr from ’Ubayd ibn Zurara who has said the following. “Abu ‘Abdallah  said, ‘You must preserve your books because you will soon need them.’”