كتاب الإيمان
1  
The Book of Faith
(60)
Chapter: Clarifying the Waswasah (Whispers, Bad Thoughts) with regard to faith, and what the one who experiences that should say
(60)
باب بَيَانِ الْوَسْوَسَةِ فِي الإِيمَانِ وَمَا يَقُولُهُ مَنْ وَجَدَهَا ‏‏
Sahih Muslim 135 b

It is narrated on the authority of Abu Huraira that he said:

The people will constantly, and the rest of the hadith is the same as that transmitted by 'Abdul-Warith with the exception that there is no mention of the Messenger of Allah in that, but he observed at the end of the hadith: Allah and His Messenger told the truth.
وَحَدَّثَنِيهِ زُهَيْرُ بْنُ حَرْبٍ، وَيَعْقُوبُ الدَّوْرَقِيُّ، قَالاَ حَدَّثَنَا إِسْمَاعِيلُ، وَهُوَ ابْنُ عُلَيَّةَ عَنْ أَيُّوبَ، عَنْ مُحَمَّدٍ، قَالَ قَالَ أَبُو هُرَيْرَةَ ‏ "‏ لاَ يَزَالُ النَّاسُ ‏"‏ ‏.‏ بِمِثْلِ حَدِيثِ عَبْدِ الْوَارِثِ غَيْرَ أَنَّهُ لَمْ يَذْكُرِ النَّبِيَّ صلى الله عليه وسلم فِي الإِسْنَادِ وَلَكِنْ قَدْ قَالَ فِي آخِرِ الْحَدِيثِ صَدَقَ اللَّهُ وَرَسُولُهُ ‏.‏
Reference : Sahih Muslim 135b
In-book reference : Book 1, Hadith 255
USC-MSA web (English) reference : Book 1, Hadith 247
  (deprecated numbering scheme)