صحيح مسلم
Sahih Muslim
باب تَرْتِيلِ الْقِرَاءَةِ وَاجْتِنَابِ الْهَذِّ وَهُوَ الإِفْرَاطُ فِي السُّرْعَةِ وَإِبَاحَةِ سُورَتَيْنِ فَأَكْثَرَ فِي الرَّكْعَةِ.
Chapter: Slow, measured pace of recitation (tartil), and to not rush when reciting, and the permissibility of reciting two or more surahs in one rak`ah
Hadith 822
This hadith is listed as number 1910 in Maktaba Shamila
وحَدَّثَنَاه إِسْحَاق بْنُ إِبْرَاهِيمَ ، أَخْبَرَنَا عِيسَى بْنُ يُونُسَ ، حَدَّثَنَا الأَعْمَشُ ، فِي هَذَا الإِسْنَادِ بِنَحْوِ حَدِيثِهِمَا ، وَقَالَ : إِنِّي لَأَعْرِفُ النَّظَائِرَ الَّتِي كَانَ يَقْرَأُ بِهِنَّ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ، " اثْنَتَيْنِ فِي رَكْعَةٍ ، عِشْرِينَ سُورَةً فِي عَشْرِ رَكَعَاتٍ " .
This hadith has been narrated by A'mash with the same chain of transmitters in which ('Abdullah bin Mas'ud) said:" I know the manners in which the Messenger of Allah (ﷺ) recited the two surahs in one rak'ah and then twenty surahs in ten rak'ahs."
