Sunan an-Nasa'i 5252
سنن النسائي#5252Sahihأَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنَا مُحَمَّدٌ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ مَنْصُورٍ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ، قَالَ لَعَنَ اللَّهُ الْمُتَنَمِّصَاتِ وَالْمُتَفَلِّجَاتِ أَلاَ أَلْعَنُ مَنْ لَعَنَ رَسُولُ اللَّهِ صلى الله عليه وسلم .
It was narrated that 'Abdullah said:"May Allah curse Al-Mutanammisat and who have their teeth separated. Shall I not curse those whom the Messenger of Allah [SAW] cursed?
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:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 48:213