Sunan Abi Dawud 1255
سنن أبي داود#1255Sahihحَدَّثَنَا أَحْمَدُ بْنُ أَبِي شُعَيْبٍ الْحَرَّانِيُّ، حَدَّثَنَا زُهَيْرُ بْنُ مُعَاوِيَةَ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، عَنْ مُحَمَّدِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ عَمْرَةَ، عَنْ عَائِشَةَ، قَالَتْ كَانَ النَّبِيُّ صلى الله عليه وسلم يُخَفِّفُ الرَّكْعَتَيْنِ قَبْلَ صَلاَةِ الْفَجْرِ حَتَّى إِنِّي لأَقُولُ هَلْ قَرَأَ فِيهِمَا بِأُمِّ الْقُرْآنِ
Narrated 'Aishah:The Prophet (ﷺ) would pray two rak'ahs before the dawn prayer lightly so much so that I would say: Did he recite Surah al-Fatihah in them
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: 5:6