Sunan Ibn Majah 2099
سنن ابن ماجه#2099Da'ifحَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا بَقِيَّةُ، عَنْ عَبْدِ اللَّهِ بْنِ مُحَرَّرٍ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، قَالَ سَمِعَ النَّبِيُّ ـ صلى الله عليه وسلم ـ رَجُلاً يَقُولُ أَنَا إِذًا لَيَهُودِيٌّ . فَقَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " وَجَبَتْ " .
It was narrated from Anas that the Messenger of Allah (ﷺ) heard a man say:"If that happens, I will be a Jew." The Messenger of Allah (ﷺ) said: 'That is guaranteed
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-AlbaniVery Daif
Muhammad Fouad Abd al-BaqiVery Daif
Shuaib Al ArnautDaif
Zubair Ali ZaiDaif
In-book reference: 11:10