Sunan Abi Dawud 1938
سنن أبي داود#1938Sahihحَدَّثَنَا ابْنُ كَثِيرٍ، حَدَّثَنَا سُفْيَانُ، عَنْ أَبِي إِسْحَاقَ، عَنْ عَمْرِو بْنِ مَيْمُونٍ، قَالَ قَالَ عُمَرُ بْنُ الْخَطَّابِ كَانَ أَهْلُ الْجَاهِلِيَّةِ لاَ يُفِيضُونَ حَتَّى يَرَوُا الشَّمْسَ عَلَى ثَبِيرٍ فَخَالَفَهُمُ النَّبِيُّ صلى الله عليه وسلم فَدَفَعَ قَبْلَ طُلُوعِ الشَّمْسِ .
Narrated Umar ibn al-Khattab: The Arabs in the pre-Islamic period did not return from al-Muzdalifah till they saw sunlight at the mountain Thabir. The Prophet (ﷺ) opposed them and returned before the sunrise
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: 11:218