Sahih Muslim , Book 4, Hadith 1793 (USC-MSA) ⓘ
This hadith has been narrated by A'mash with the same chain of transmitters in which ('Abdullah b. Mas'ud) said: " I know the manners in which the Messenger of Allah recited the two surahs in one rak'ah and then twenty surahs in ten rak'ahs."
وَحَدَّثَنَاهُ إِسْحَاقُ بْنُ إِبْرَاهِيمَ، أَخْبَرَنَا عِيسَى بْنُ يُونُسَ، حَدَّثَنَا الأَعْمَشُ، فِي هَذَا الإِسْنَادِ . بِنَحْوِ حَدِيثِهِمَا وَقَالَ إِنِّي لأَعْرِفُ النَّظَائِرَ الَّتِي كَانَ يَقْرَأُ بِهِنَّ رَسُولُ اللَّهِ صلى الله عليه وسلم اثْنَتَيْنِ فِي رَكْعَةٍ . عِشْرِينَ سُورَةً فِي عَشْرِ رَكَعَاتٍ .
also referenced under: Book 6, Hadith 338 (In-Book) & Hadith 822 (Reference)