Sunan Abi Dawud 1466
سنن أبي داود#1466Da'ifحَدَّثَنَا يَزِيدُ بْنُ خَالِدِ بْنِ مَوْهَبٍ الرَّمْلِيُّ، حَدَّثَنَا اللَّيْثُ، عَنِ ابْنِ أَبِي مُلَيْكَةَ، عَنْ يَعْلَى بْنِ مَمْلَكٍ، أَنَّهُ سَأَلَ أُمَّ سَلَمَةَ عَنْ قِرَاءَةِ، رَسُولِ اللَّهِ صلى الله عليه وسلم وَصَلاَتِهِ فَقَالَتْ وَمَا لَكُمْ وَصَلاَتَهُ كَانَ يُصَلِّي وَيَنَامُ قَدْرَ مَا صَلَّى ثُمَّ يُصَلِّي قَدْرَ مَا نَامَ ثُمَّ يَنَامُ قَدْرَ مَا صَلَّى حَتَّى يُصْبِحَ وَنَعَتَتْ قِرَاءَتَهُ فَإِذَا هِيَ تَنْعَتُ قِرَاءَتَهُ حَرْفًا حَرْفًا .
Narrated Umm Salamah, Ummul Mu'minin: Ya'la ibn Mumallak said that he asked Umm Salamah about the recitation and prayer of the Messenger of Allah (ﷺ). She said: What have you to do with his prayer? He would pray, then sleep as long as he had prayed, till morning. She then described his recitation and did so with an exposition word by word
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: 8:51