Sunan an-Nasa'i 5226
سنن النسائي#5226SahihIt was narrated from Ibn 'Umar that:The Prophet [SAW] said: "Trim the mustache and let the beard grow
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: 48:187