Sunan Abi Dawud 4051
سنن أبي داود#4051Sahihحَدَّثَنَا حَفْصُ بْنُ عُمَرَ، وَمُسْلِمُ بْنُ إِبْرَاهِيمَ، قَالاَ حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي إِسْحَاقَ، عَنْ هُبَيْرَةَ، عَنْ عَلِيٍّ، - رضى الله عنه - قَالَ نَهَانِي رَسُولُ اللَّهِ صلى الله عليه وسلم عَنْ خَاتَمِ الذَّهَبِ وَعَنْ لُبْسِ الْقَسِّيِّ وَالْمِيثَرَةِ الْحَمْرَاءِ .
Narrated Ali ibn AbuTalib: The Messenger of Allah (ﷺ) forbade me to wear a gold ring, or a Qassi garment or the use purple saddle-cloths
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-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautHasan
Zubair Ali ZaiIsnaad Hasan
In-book reference: 34:32