Sahih Muslim #860 · The Book of Marriage

Sahih MuslimA hadith like it has been narrated by Abu Huraira but for these words
Sahih Muslim · Book 16 · The Book of Marriage
Sahih Muslim · كتاب 16 · كتاب النكاح
" He (the man saying the prayer) does not know how much he has prayed.
حَدَّثَنَا مُحَمَّدُ بْنُ رَافِعٍ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، حَدَّثَنَا مَعْمَرٌ، عَنْ هَمَّامِ بْنِ مُنَبِّهٍ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم بِمِثْلِهِ غَيْرَ أَنَّهُ قَالَ ‏
"‏ حَتَّى يَظَلَّ الرَّجُلُ إِنْ يَدْرِي كَيْفَ صَلَّى ‏"‏ ‏.‏
Reference : Sahih Muslim 860In-book reference : Book 4, Hadith 23