4- حَدَّثَنَا عَلِيُّ بْنُ أَحْمَدَ بْنِ مُحَمَّدٍ رَضِيَ اللَّهُ عَنْهُ قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ أَبِي عَبْدِ اللَّهِ الْكُوفِيُّ قَالَ حَدَّثَنَا سَهْلُ بْنُ زِيَادٍ الْآدَمِيُّ قَالَ حَدَّثَنَا الْحَسَنُ بْنُ مَحْبُوبٍ عَنْ عَبْدِ الْعَزِيزِ الْعَبْدِيِّ عَنِ ابْنِ أَبِي يَعْفُورٍ قَالَ قَالَ أَبُو عَبْدِ اللَّهِ ع مَنْ أَقَرَّ بِالْأَئِمَّةِ مِنْ آبَائِي وَ وُلْدِي وَ جَحَدَ الْمَهْدِيَّ مِنْ وُلْدِي كَانَ كَمَنْ أَقَرَّ بِجَمِيعِ الْأَنْبِيَاءِ وَ جَحَدَ مُحَمَّداً ص فَقُلْتُ يَا سَيِّدِي وَ مَنِ الْمَهْدِيُّ مِنْ وُلْدِكَ قَالَ الْخَامِسُ مِنْ وُلْدِ السَّابِعِ يَغِيبُ عَنْهُمْ شَخْصُهُ وَ لَا يَحِلُّ لَهُمْ تَسْمِيَتُهُ.
4 - Narrated to us Ali bin Ahmad bin Muhammad (r.a.): Narrated to us Muhammad bin Abi Abdullah Kufi: Narrated to us Sahl bin Ziyad Adami: Narrated to us Hasan bin Mahboob from Abdul Aziz Abdi from Ibne Abi Yafur that he said: Abi Abdullah 
said:
“One who has faith in the Imams from my forefathers and my descendants, but denies the Mahdi from my progeny, is like one who believes in all the prophets but rejects Muhammad (S). I said: My chief, who is the Mahdi from your progeny? He replied: The fifth descendant of the seventh Imam, whose person will remain hidden from your view and uttering his name is unlawful for you.”
