Sunan Abi Dawud 1934
سنن أبي داود#1934Sahihحَدَّثَنَا مُسَدَّدٌ، أَنَّ عَبْدَ الْوَاحِدِ بْنَ زِيَادٍ، وَأَبَا، عَوَانَةَ وَأَبَا مُعَاوِيَةَ حَدَّثُوهُمْ عَنِ الأَعْمَشِ، عَنْ عُمَارَةَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ يَزِيدَ، عَنِ ابْنِ مَسْعُودٍ، قَالَ مَا رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم صَلَّى صَلاَةً إِلاَّ لِوَقْتِهَا إِلاَّ بِجَمْعٍ فَإِنَّهُ جَمَعَ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ بِجَمْعٍ وَصَلَّى صَلاَةَ الصُّبْحِ مِنَ الْغَدِ قَبْلَ وَقْتِهَا .
Ibn Mas’ud said “ I never saw the Apostle of Allaah(ﷺ) observe a prayer out of its proper time except(two prayers) at Al Muzdalifah. He combined the sunset and night prayers at Al Muzdalifah and he offered the dawn prayer that day before its proper time
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: 11:214