Narrated by:Zaid bin Arqam said
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.'"
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 " .
Nesai
The Book of Purification • Hadith 13