A man came to Ibn Masʿud and said, "I recited the Mufassal (Suras) at night in one rakʿa." Ibn Masʿud said, "This recitation is (too quick) like the recitation of poetry. I know the identical Suras which the Prophet ﷺ used to recite in pairs." Ibn Masʿud then mentioned 20 Mufassal Suras including two Suras from the family of (i.e. those verses which begin with) Ha, Meem [??] (which the Prophet ﷺ used to recite) in each rakʿa.  

هَذًّا كَهَذِّ الشِّعْرِ لَقَدْ عَرَفْتُ النَّظَائِرَ الَّتِي كَانَ النَّبِيُّ ﷺ يَقْرِنُ بَيْنَهُنَّ فَذَكَرَ عِشْرِينَ سُورَةً مِنَ الْمُفَصَّلِ 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.  

إِنِّي قَرَأْتُ الْمُفَصَّلَ اللَّيْلَةَ كُلَّهُ فِي رَكْعَةٍ فَقَالَ عَبْدُ اللَّهِ هَذًّا كَهَذِّ الشِّعْرِ فَقَالَ عَبْدُ اللَّهِ لَقَدْ عَرَفْتُ النَّظَائِرَ الَّتِي كَانَ رَسُولُ اللَّهِ ﷺ يَقْرُنُ بَيْنَهُنَّ قَالَ فَذَكَرَ عِشْرِينَ سُورَةً مِنَ الْمُفَصَّلِ سُورَتَيْنِ سُورَتَيْنِ فِي كُلِّ رَكْعَةٍ  

"I heard Abu Wa'il say: "A man said in the presence of Abdullah: 'I recited Al-Mufassal in one rak'ah.' He said: 'That is like reciting poetry. I know the similar surahs that the Messenger of Allah ﷺ used to recite together.' And he mentioned twenty surahs from Al-Mufassal, two by two in each rak'ah."  

رَجُلٌ عِنْدَ عَبْدِ اللَّهِ قَرَأْتُ الْمُفَصَّلَ فِي رَكْعَةٍ قَالَ هَذًّا كَهَذِّ الشِّعْرِ لَقَدْ عَرَفْتُ النَّظَائِرَ الَّتِي كَانَ رَسُولُ اللَّهِ ﷺ يَقْرُنُ بَيْنَهُنَّ فَذَكَرَ عِشْرِينَ سُورَةً مِنَ الْمُفَصَّلِ سُورَتَيْنِ سُورَتَيْنِ فِي 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. (Using translation from Muslim 822f)  

إِنِّي قَرَأْتُ الْمُفَصَّلَ كُلَّهُ فِي رَكْعَةٍ فَقَالَ عَبْدُ اللهِ هَذًّا كَهَذِّ الشِّعْرِ؟ لَقَدْ عَرَفْتُ النَّظَائِرَ الَّتِي كَانَ رَسُولُ اللهِ ﷺ يَقْرُنُ بَيْنَهُنَّ قَالَ فَذَكَرَ عِشْرِينَ سُورَةً مِنَ الْمُفَصَّلِ سُورَتَيْنِ سُورَتَيْنِ فِي كُلِّ رَكْعَةٍ  

"I heard Abu Wa'il say: "A man said in the presence of Abdullah: 'I recited Al-Mufassal in one rak'ah.' He said: 'That is like reciting poetry. I know the similar surahs that the Messenger of Allah ﷺ used to recite together.' And he mentioned twenty surahs from Al-Mufassal, two by two in each rak'ah." (Using translation from Nasāʾī 1005)   

إِنِّي قَرَأْتُ الْمُفَصَّلَ اللَّيْلَةَ كُلَّهُ فِي رَكْعَةٍ فَقَالَ عَبْدُ اللَّهِ «هَذَا كَهَذِّ الشِّعْرِ لَقَدْ عَرَفْنَا النَّظَائِرَ الَّتِي كَانَ رَسُولُ اللَّهِ ﷺ يَقْرِنُ بِهِنَّ فَذَكَرَ عِشْرِينَ سُورَةً مِنَ الْمُفَصَّلِ سُورَتَيْنِ سُورَتَيْنِ فِي رَكْعَةٍ»  

[Machine] Does Ibn Mas'ood recite like this poetry? I have recognized the similarities that the Messenger of Allah ﷺ used to associate between them and mentioned twenty surahs from the beginning of the separated ones, including two surahs in one Rak'ah.  

لَهُ ابْنُ مَسْعُودٍ ؓ أَهَذًّا كَهَذِّ الشِّعْرِ؟ لَقَدْ عَرَفْتُ النَّظَائِرَ الَّتِي كَانَ رَسُولُ اللهِ ﷺ يَقْرُنُ بَيْنَهُنَّ وَذَكَرَ عِشْرِينَ سُورَةً مِنْ أَوَّلِ الْمُفَصَّلِ سُورَتَيْنِ فِي رَكْعَةٍ وَاحِدَةٍ