أَخْبَرَنَا عَمْرُو بْنُ سَوَّادٍ، قَالَ حَدَّثَنَا ابْنُ وَهْبٍ، قَالَ حَدَّثَنَا عَمْرُو بْنُ الْحَارِثِ، عَنْ يَزِيدَ بْنِ أَبِي حَبِيبٍ، عَنْ سُلَيْمَانَ بْنِ سِنَانٍ الْمُزَنِيِّ، أَنَّهُ سَمِعَ أَبَا هُرَيْرَةَ، يَقُولُ سَمِعْتُ أَبَا الْقَاسِمِ، صلى الله عليه وسلم يَقُولُ فِي صَلاَتِهِ ‏"‏ اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ فِتْنَةِ الْقَبْرِ وَمِنْ فِتْنَةِ الدَّجَّالِ وَمِنْ فِتْنَةِ الْمَحْيَا وَالْمَمَاتِ وَمِنْ حَرِّ جَهَنَّمَ ‏"‏ ‏.‏ قَالَ أَبُو عَبْدِ الرَّحْمَنِ هَذَا الصَّوَابُ ‏.‏

It was narrated from Sulaiman bin Sinan Al-Muzani that he heard Abu Hurairah say: "I heard Abu Al-Qasim [SAW] say, during his prayer: 'Allahumma, inni a'udhu bika min fitnatil-qabri, wa fitnatid-dajjali, wa min fitnatil-mahya wal-mamati, wa min harri jahannam (O Allah, I seek refuge with You from the trial of the grave, and from the tribulation of the Dajjal, and from the trials of life and death, and from the heat of Hell.)'" Translation Not Available

Book Ref: Sunan An Nisai Book 50 Hadith 5520
Web Ref:  Sunan An Nisai Vol 6 Book 50 Hadith 5522