 ١ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ مُحَمَّدِ بْنِ الْحُسَيْنِ عَنْ صَفْوَانَ عَنْ يَعْقُوبَ بْنِ شُعَيْبٍ قَالَ قُلْتُ لابِي عَبْدِ الله (عَلَيْهِ السَّلام) إِذَا حَدَثَ عَلَى الامَامِ حَدَثٌ كَيْفَ يَصْنَعُ النَّاسُ قَالَ أَيْنَ قَوْلُ الله عَزَّ وَجَلَّ فَلَوْ لا نَفَرَ مِنْ كُلِّ فِرْقَةٍ مِنْهُمْ طائِفَةٌ لِيَتَفَقَّهُوا فِي الدِّينِ وَلِيُنْذِرُوا قَوْمَهُمْ إِذا رَجَعُوا إِلَيْهِمْ لَعَلَّهُمْ يَحْذَرُونَ قَالَ هُمْ فِي عُذْرٍ مَا دَامُوا فِي الطَّلَبِ وَهَؤُلاءِ الَّذِينَ يَنْتَظِرُونَهُمْ فِي عُذْرٍ حَتَّى يَرْجِعَ إِلَيْهِمْ أَصْحَابُهُمْ.
 1. Muhammad ibn Yahya has narrated from Muhammad b. al-Hussain from Safwan from Ya‘qub ibn Shu‘ayb who said the following: “I asked Abu ‘Abdallah , ‘If something would happen to the Imam what should then the people do?” The Imam  said, “Where are the words of Allah, the Most Majestic, the Most Gracious, ‘Not all believers have to become specialists in religious learning. Why do not some people from each group of believers seek to become specialists in religious learning and, after completing their studies, guide their group so that they will have fear of God.’” (9:122) The Imam  said, “They will have good reason to be excused as long as they are searching also those who wait for them until they complete their religious education and return back to them.”