Sunan an-Nasa'i 4006
سنن النسائي#4006Sahihأَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، قَالَ حَدَّثَنَا الأَنْصَارِيُّ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ عَمْرٍو، عَنْ أَبِي الزِّنَادِ، عَنْ خَارِجَةَ بْنِ زَيْدٍ، عَنْ زَيْدِ بْنِ ثَابِتٍ، قَالَ نَزَلَتْ هَذِهِ الآيَةُ { وَمَنْ يَقْتُلْ مُؤْمِنًا مُتَعَمِّدًا فَجَزَاؤُهُ جَهَنَّمُ خَالِدًا فِيهَا } الآيَةُ كُلُّهَا بَعْدَ الآيَةِ الَّتِي نَزَلَتْ فِي الْفُرْقَانِ بِسِتَّةِ أَشْهُرٍ . قَالَ أَبُو عَبْدِ الرَّحْمَنِ مُحَمَّدُ بْنُ عَمْرٍو لَمْ يَسْمَعْهُ مِنْ أَبِي الزِّنَادِ .
It was narrated that Zaid bin Thabit said:"This Verse - 'And whoever kills a believer intentionally, his recompense is Hell' - was revealed six months after the Verse which was revealed in Surat Al-Furqan
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: 37:41