Sunan Ibn Majah 1219
سنن ابن ماجه#1219Hasanحَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، وَعُثْمَانُ بْنُ أَبِي شَيْبَة��، قَالاَ حَدَّثَنَا إِسْمَاعِيلُ بْنُ عَيَّاشٍ، عَنْ عُبَيْدِ اللَّهِ بْنِ عُبَيْدٍ، عَنْ زُهَيْرِ بْنِ سَالِمٍ الْعَنْسِيِّ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ جُبَيْرِ بْنِ نُفَيْرٍ، عَنْ ثَوْبَانَ، قَالَ سَمِعْتُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ يَقُولُ " فِي كُلِّ سَهْوٍ سَجْدَتَانِ بَعْدَ مَا يُسَلِّمُ " .
It was narrated that Thawban said:“I heard the Messenger of Allah (ﷺ) say: ‘For every mistake there are two prostrations, after saying the Salam.’”
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:
In-book reference: 5:417