Sunan an-Nasa'i 13

سنن النسائي#13Sahih

أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ، قَالَ أَنْبَأَنَا عَبِيدَةُ بْنُ حُمَيْدٍ، عَنْ يُوسُفَ بْنِ صُهَيْبٍ، عَنْ حَبِيبِ بْنِ يَسَارٍ، عَنْ زَيْدِ بْنِ أَرْقَمَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ مَنْ لَمْ يَأْخُذْ شَارِبَهُ فَلَيْسَ مِنَّا ‏"‏ ‏.‏

It was narrated that Zaid bin Arqam said:"The Messenger of Allah (ﷺ) said: 'Whoever does not trim his mustache, he is not from one of us

Scholarly Authentication

The label above is the grade most of these scholars gave, each scholar counted once — 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. When they judged only its chain of narrators (“Isnaad”), the label says “Sound chain”. Each scholar's own wording:

Al-AlbaniSahih
Zubair Ali ZaiSahih

Our source also lists this ruling under Abu Ghuddah, the editor of the printed edition it was taken from. It is al-Albani's ruling printed again, so it is counted once.

In-book reference: 1:13