Sunan Ibn Majah 3501
سنن ابن ماجه#3501Da'ifحَدَّثَنَا مُحَمَّدُ بْنُ عُبَيْدِ بْنِ عُتْبَةَ بْنِ عَبْدِ الرَّحْمَنِ الْكِنْدِيُّ، حَدَّثَنَا عَلِيُّ بْنُ ثَابِتٍ، حَدَّثَنَا سَعَّادُ بْنُ سُلَيْمَانَ، عَنْ أَبِي إِسْحَاقَ، عَنِ الْحَارِثِ، عَنْ عَلِيٍّ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " خَيْرُ الدَّوَاءِ الْقُرْآنُ " .
It was narrated from ‘Ali that the Messenger of Allah (ﷺ) said:“The best remedy is the Qur’an.”
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 Fouad Abd al-BaqiDaif
Shuaib Al ArnautDaif
Zubair Ali ZaiDaif
In-book reference: 31:66