The Book of Adornment - Sunan an-Nasa'i 5045

That the Messenger of Allah [SAW] said: "Trim the mustache and let the beard grow."

Commentary on the Command

This noble hadith establishes two distinct rulings concerning facial hair for Muslim men. The command to trim the mustache (إحفاء الشارب) means to shorten it so it does not cover the upper lip, facilitating cleanliness during eating and drinking.

The instruction to let the beard grow (إعفاء اللحية) signifies leaving it natural without shaving or significantly shortening it. Scholars differ on the precise minimum length, but agree that shaving it completely is prohibited as it constitutes altering Allah's creation.

Legal Ruling and Wisdom

The majority of scholars consider growing the beard obligatory (wajib) as it follows the natural disposition (fitrah) and distinguishes Muslim men from non-believers. The mustache trimming ensures hygiene and prevents food particles from being trapped.

This practice maintains the distinction between Muslims and others, particularly during times when certain groups would shave beards and grow large mustaches. It preserves the prophetic tradition and Muslim identity.

Spiritual Significance

Observing this Sunnah embodies obedience to Allah's Messenger and adherence to the natural disposition upon which Allah created mankind. It serves as constant physical reminder of one's faith and commitment to Islamic teachings in daily life.