حَدَّثَنَا أَبِي وَ مُحَمَّدُ بْنُ الْحَسَنِ رَضِيَ اللَّهُ عَنْهُمَا قَالا حَدَّثَنَا سَعْدُ بْنُ عَبْدِ اللَّهِ وَ عَبْدُ اللَّهِ بْنُ جَعْفَرٍ قَالا حَدَّثَنَا مُحَمَّدُ بْنُ عِيسَى وَ مُحَمَّدُ بْنُ الْحُسَيْنِ بْنِ أَبِي الْخَطَّابِ جَمِيعاً عَنْ مُحَمَّدِ بْنِ سِنَانٍ عَنْ حَمْزَةَ الطَّيَّارِ قَالَ سَمِعْتُ أَبَا عَبْدِ اللَّهِ عليه السلام يَقُولُ لَوْ لَمْ يَبْقَ مِنْ أَهْلِ الْأَرْضِ إِلَّا اثْنَانِ لَكَانَ أَحَدُهُمَا الْحُجَّةَ أَوْ كَانَ الثَّانِي الْحُجَّةَ الشَّكُّ مِنْ مُحَمَّدِ بْنِ سِنَانٍ.
Narrated to us my father and Muhammad bin Hasan - may Allah be pleased with them -they said: Narrated to us Saad bin Abdullah and Abdullah bin Ja’far they said: Narrated to us Muhammad bin Isa and Muhammad bin Husain bin Abil Khattab all of them from Muhammad bin Sinan from Hamza Tayyar that he said: I heard Aba Abdillah 
say: “If none remains on the earth except two persons, one of them will be the Divine Proof” or he said, “The second of them is the Divine Proof”. This doubt is from Muhammad bin Sinan.
