كتاب العلم
47  
The Book of Knowledge
(5)
Chapter: The Taking Away Of Knowledge And The Spread Of Ignorance At The End Of Time
(5)
باب رَفْعِ الْعِلْمِ وَقَبْضِهِ وَظُهُورِ الْجَهْلِ وَالْفِتَنِ فِي آخِرِ الزَّمَانِ
Sahih Muslim 2672 d

Abu Wa'il reported:

I was sitting with Abu Musa and 'Abdullah and they were conversing with each other and Abu Musa reported Allah's Messenger (ﷺ) as saying (that we find in the above-mentioned ahadith).
حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، أَخْبَرَنَا جَرِيرٌ، عَنِ الأَعْمَشِ، عَنْ أَبِي وَائِلٍ، قَالَ إِنِّي لَجَالِسٌ مَعَ عَبْدِ اللَّهِ وَأَبِي مُوسَى وَهُمَا يَتَحَدَّثَانِ فَقَالَ أَبُو مُوسَى قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم بِمِثْلِهِ ‏.‏
Reference : Sahih Muslim 2672d
In-book reference : Book 47, Hadith 17
USC-MSA web (English) reference : Book 34, Hadith 6457
  (deprecated numbering scheme)