Sahih Muslim 2891 a
Hudhaifa b. al-Yaman reported:
By Allah, I have the best knowledge amongst people about every turmoil which is going to appear in the period intervening me and the Last Hour; and it is not for the fact that Allah's Messenger (ﷺ) told me something confidentially pertaining to it and he did not tell anybody else about it, but it is because of the fact that I was present in the assembly in which he had been describing the turmoil. and he especially made a mention of three turmoils which would not spare anything and amongst these there would be turmoils like storms in the hot season. Some of them would be violent and some of them would be comparatively mild. Hudhaifa said: All (who were present) except I have gone (to the next world).
حَدَّثَنِي حَرْمَلَةُ بْنُ يَحْيَى التُّجِيبِيُّ، أَخْبَرَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي يُونُسُ، عَنِ ابْنِ شِهَابٍ،
 أَنَّ أَبَا إِدْرِيسَ الْخَوْلاَنِيَّ، كَانَ يَقُولُ قَالَ حُذَيْفَةُ بْنُ الْيَمَانِ وَاللَّهِ إِنِّي لأَعْلَمُ النَّاسِ بِكُلِّ
 فِتْنَةٍ هِيَ كَائِنَةٌ فِيمَا بَيْنِي وَبَيْنَ السَّاعَةِ وَمَا بِي إِلاَّ أَنْ يَكُونَ رَسُولُ اللَّهِ صلى الله عليه
 وسلم أَسَرَّ إِلَىَّ فِي ذَلِكَ شَيْئًا لَمْ يُحَدِّثْهُ غَيْرِي وَلَكِنْ رَسُولُ اللَّهِ صلى الله عليه وسلم قَالَ
 وَهُوَ يُحَدِّثُ مَجْلِسًا أَنَا فِيهِ عَنِ الْفِتَنِ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَهُوَ يَعُدُّ
 الْفِتَنَ ‏
"‏ مِنْهُنَّ ثَلاَثٌ لاَ يَكَدْنَ يَذَرْنَ شَيْئًا وَمِنْهُنَّ فِتَنٌ كَرِيَاحِ الصَّيْفِ مِنْهَا صِغَارٌ وَمِنْهَا
 كِبَارٌ ‏"‏ ‏.‏ قَالَ حُذَيْفَةُ فَذَهَبَ أُولَئِكَ الرَّهْطُ كُلُّهُمْ غَيْرِي ‏.‏