Sunan Ibn Majah 2535
سنن ابن ماجه#2535Sahihحَدَّثَنَا مُحَمَّدُ بْنُ الصَّبَّاحِ، أَنْبَأَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنْ أَيُّوبَ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم (مَنْ بَدَّلَ دِينَهُ فَاقْتُلُوهُ ).
It was narrated from Ibn`Abbas that the Messenger of Allah (ﷺ) said:“Whoever changes his religion, execute him.”
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 Fouad Abd al-BaqiSahih
Zubair Ali ZaiSahih Bukhari
In-book reference: 20:3