Sunan an-Nasa'i 1006
سنن النسائي#1006Sahihأَخْبَرَنَا عَمْرُو بْنُ مَنْصُورٍ، قَالَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ رَجَاءٍ، قَالَ أَنْبَأَنَا إِسْرَائِيلُ، عَنْ أَبِي حَصِينٍ، عَنْ يَحْيَى بْنِ وَثَّابٍ، عَنْ مَسْرُوقٍ، عَنْ عَبْدِ اللَّهِ، وَأَتَاهُ، رَجُلٌ فَقَالَ إِنِّي قَرَأْتُ اللَّيْلَةَ الْمُفَصَّلَ فِي رَكْعَةٍ . فَقَالَ هَذًّا كَهَذِّ الشِّعْرِ لَكِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَقْرَأُ النَّظَائِرَ عِشْرِينَ سُورَةً مِنَ الْمُفَصَّلِ مِنْ آلِ حم .
It was narrated from 'Abdullah that:A man came to him and said: "Last night I recited Al-Mufassal in one rak'ah." He said: "That is like reciting poetry. But the Messenger of Allah (ﷺ) used to recite similar surahs, twenty surahs from Al-Mufassal, those that start with Ha-Mim
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 11:131