Sunan Ibn Majah 1561
سنن ابن ماجه#1561Sahihحَدَّثَنَا الْعَبَّاسُ بْنُ جَعْفَرٍ، حَدَّثَنَا مُحَمَّدُ بْنُ أَيُّوبَ أَبُو هُرَيْرَةَ الْوَاسِطِيُّ، حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ مُحَمَّدٍ، عَنْ كَثِيرِ بْنِ زَيْدٍ، عَنْ زَيْنَبَ بِنْتِ نُبَيْطٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ أَعْلَمَ قَبْرَ عُثْمَانَ بْنِ مَظْعُونٍ بِصَخْرَةٍ .
It was narrated from Anas bin Malik that the Messenger of Allah (ﷺ) marked the grave of ‘Uthman bin Maz’un with a rock
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-AlbaniHasan Sahih
Muhammad Fouad Abd al-BaqiHasan Sahih
Shuaib Al ArnautHasan
Zubair Ali ZaiHasan
In-book reference: 6:129