كتاب الزهد والرقائق
55
The Book of Zuhd and Softening of Hearts
(16)
Chapter: Verification Of Hadith And The Ruling On Writing Down Knowledge
(16)
باب التَّثَبُّتِ فِي الْحَدِيثِ وَحُكْمِ كِتَابَةِ الْعِلْمِ

It was reported that Abu Huraira used to say:

Listen to me, inmate of the apartment; listen to me, inmate of the apartment, while 'A'isha (Allah be pleased with her) had been busy in observing prayer. As she finished prayer, she said to" Urwa: Did you hear his words? And this is how Allah's Messenger (ﷺ) used to utter (so distinctly) that if one intended to count (the words uttered) he would be able to do so.
حَدَّثَنَا هَارُونُ بْنُ مَعْرُوفٍ، حَدَّثَنَا بِهِ، سُفْيَانُ بْنُ عُيَيْنَةَ عَنْ هِشَامٍ، عَنْ أَبِيهِ، قَالَ كَانَ أَبُو هُرَيْرَةَ يُحَدِّثُ وَيَقُولُ اسْمَعِي يَا رَبَّةَ الْحُجْرَةِ اسْمَعِي يَا رَبَّةَ الْحُجْرَةِ ‏.‏ وَعَائِشَةُ تُصَلِّي فَلَمَّا قَضَتْ صَلاَتَهَا قَالَتْ لِعُرْوَةَ أَلاَ تَسْمَعُ إِلَى هَذَا وَمَقَالَتِهِ آنِفًا إِنَّمَا كَانَ النَّبِيُّ صلى الله عليه وسلم يُحَدِّثُ حَدِيثًا لَوْ عَدَّهُ الْعَادُّ لأَحْصَاهُ ‏.‏
Reference : Sahih Muslim 2493 b
In-book reference : Book 55, Hadith 91
USC-MSA web (English) reference : Book 42, Hadith 7146
  (deprecated numbering scheme)