Sahih Muslim 2779 a
Qais reported:
I said to 'Ammar: What is your opinion about that which you have done in case (of your siding with Hadrat 'Ali)? Is it your personal opinion or something you got from Allah's Messenger (ﷺ)? 'Ammar said: We have got nothing from Allah's Messenger (ﷺ) which people at large did not get, but Hudhaifa told me that Allah's Apostle (ﷺ) had especially told him amongst his Companion, that there would be twelve hypocrites out of whom eight would not get into Paradise, until a camel would be able to pass through the needle hole. The ulcer would be itself sufficient (to kill) eight. So far as four are concerned, I do not remember what Shu'ba said about them.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَسْوَدُ بْنُ عَامِرٍ، حَدَّثَنَا شُعْبَةُ بْنُ الْحَجَّاجِ،
 عَنْ قَتَادَةَ، عَنْ أَبِي نَضْرَةَ، عَنْ قَيْسٍ، قَالَ قُلْتُ لِعَمَّارٍ أَرَأَيْتُمْ صَنِيعَكُمْ هَذَا الَّذِي صَنَعْتُمْ
 فِي أَمْرِ عَلِيٍّ أَرَأْيًا رَأَيْتُمُوهُ أَوْ شَيْئًا عَهِدَهُ إِلَيْكُمْ رَسُولُ اللَّهِ صلى الله عليه وسلم فَقَالَ
 مَا عَهِدَ إِلَيْنَا رَسُولُ اللَّهِ صلى الله عليه وسلم شَيْئًا لَمْ يَعْهَدْهُ إِلَى النَّاسِ كَافَّةً وَلَكِنْ حُذَيْفَةُ
 أَخْبَرَنِي عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم ‏
"‏ فِي أَصْحَابِي
 اثْنَا عَشَرَ مُنَافِقًا فِيهِمْ ثَمَانِيَةٌ لاَ يَدْخُلُونَ الْجَنَّةَ حَتَّى يَلِجَ الْجَمَلُ فِي سَمِّ الْخِيَاطِ ثَمَانِيَةٌ
 مِنْهُمْ تَكْفِيكَهُمُ الدُّبَيْلَةُ وَأَرْبَعَةٌ ‏"‏ ‏.‏ لَمْ أَحْفَظْ مَا قَالَ شُعْبَةُ فِيهِمْ ‏.‏