Sunan an-Nasa'i 5047
سنن النسائي#5047SahihIt was narrated that Zaid bin Al-Arqam said:"I heard the Messenger of Allah [SAW] say: 'Whoever does not take from his mustache, he is not one of us
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 48:8