Sunan Abi Dawud 2593
سنن أبي داود#2593Da'ifحَدَّثَنَا عُقْبَةُ بْنُ مُكْرَمٍ، حَدَّثَنَا سَلْمُ بْنُ قُتَيْبَةَ الشَّعِيرِيُّ، عَنْ شُعْبَةَ، عَنْ سِمَاكٍ، عَنْ رَجُلٍ، مِنْ قَوْمِهِ عَنْ آخَرَ، مِنْهُمْ قَالَ رَأَيْتُ رَايَةَ رَسُولِ اللَّهِ صلى الله عليه وسلم صَفْرَاءَ .
Narrated Simak ibn Harb: Simak reported on the authority of a man from his people, on the authority of another man from them: I saw that the standard of the Messenger of Allah (ﷺ) was yellow
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:
Al-AlbaniDaif
Muhammad Muhyi Al-Din Abdul HamidDaif
Shuaib Al ArnautDaif
Zubair Ali ZaiDaif
In-book reference: 15:117