Sahih Muslim 822
Sahih Muslim · Book 6: The Book of Prayer - Travellers · 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
Abu Wa'il reported:
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى ، وَابْنُ، بَشَّارٍ قَالَ ابْنُ الْمُثَنَّى حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ ، حَدَّثَنَا شُعْبَةُ ، عَنْ عَمْرِو بْنِ مُرَّةَ ، أَنَّهُ سَمِعَ أَبَا وَائِلٍ ، يُحَدِّثُ أَنَّ رَجُلاً، جَاءَ إِلَى ابْنِ مَسْعُودٍ فَقَالَ إِنِّي قَرَأْتُ الْمُفَصَّلَ اللَّيْلَةَ كُلَّهُ فِي رَكْعَةٍ . فَقَالَ عَبْدُ اللَّهِ هَذًّا كَهَذِّ الشِّعْرِ فَقَالَ عَبْدُ اللَّهِ لَقَدْ عَرَفْتُ النَّظَائِرَ الَّتِي كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَقْرُنُ بَيْنَهُنَّ - قَالَ - فَذَكَرَ عِشْرِينَ سُورَةً مِنَ الْمُفَصَّلِ سُورَتَيْنِ سُورَتَيْنِ فِي كُلِّ رَكْعَةٍ .
A person came to 'Abdullah b. Mas'ud and said: I recited all the mufassal surahs in one rak'ah during the night. 'Abdullah said: You must have recited hastily like the recitation of poetry. 'Abdullah said: I remember well the manner in which the Messenger of Allah (ﷺ) used to combine them, and he then mentioned twenty of the mufassal surahs, and (their combinations in) two in every rak'ah.