"The deeds connected to the Fitrah are: Clipping the nails, removing the mustache and shaving the pubes."
Sunan an-Nasa'i Book 1, Hadith 12
← Previous Hadith "The Fitrah are five: Circumcision, shaving the pubes, plucking the armpit hairs, clipping the nails and taking from the mustache."

Sunan an-Nasa'i Book 1, Hadith 11 Next Hadith → "The Messenger of Allah (ﷺ) said: 'Whoever does not trim his mustache, he is not from one of us.'"

Sunan an-Nasa'i Book 1, Hadith 13