Sayyiduna Abu Huraira (may Allah be pleased with him) narrated from the Noble Prophet (peace and blessings be upon him) that five things are from the natural disposition (or he said: five things are from the fitrah): circumcision, shaving the pubic hair, plucking the armpit hair, trimming the nails, and shortening the mustache.
Hadith Referenceاللؤلؤ والمرجان / كتاب الطهارة / 145
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: 77 كتاب اللباس: 63 باب قص الشارب»