Sunan Abi Dawud 3208
سنن أبي داود#3208Sahihحَدَّثَنَا إِسْحَاقُ بْنُ إِسْمَاعِيلَ، حَدَّثَنَا حَكَّامُ بْنُ سَلْمٍ، عَنْ عَلِيِّ بْنِ عَبْدِ الأَعْلَى، عَنْ أَبِيهِ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " اللَّحْدُ لَنَا وَالشَّقُّ لِغَيْرِنَا " .
Narrated Abdullah ibn Abbas: The Prophet (ﷺ) said: The niche in the side of the grave is for us and the excavation in the middle is for others
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
Zubair Ali ZaiDaif
In-book reference: 21:120