The Book of Purification (Kitab Al-Taharah) 
Muslim :: Book 2 : Hadith 501
Abu Huraira reported: The Messenger of Allah (may peace be upon him) said: Trim closely the moustache, and grow beard, and thus act against the fire-worshippers.
The Book of Purification (Kitab Al-Taharah)
Muslim :: Book 2 : Hadith 501
Abu Huraira reported: The Messenger of Allah (may peace be upon him) said: Trim closely the moustache, and grow beard, and thus act against the fire-worshippers.