Excerpted from the book: Aḥkām wa Masā’il – In the Light of the Qur’an and Sunnah by Shaykh Mubashar Ahmad Rabbani
❖ Question:
What has the Prophet ﷺ instructed regarding a man who keeps a moustache?
And how long should the beard be kept? A certain scholar said that the beard must be one fist long and not shorter than that — is this correct? Please explain with evidence from Qur’an and Sunnah.
❖ Answer:
The Messenger of Allah ﷺ clearly instructed that both trimming the moustache and letting the beard grow are part of the natural disposition (fiṭrah) of Islam.
1. Trimming the Moustache & Growing the Beard is from Fiṭrah:
The Prophet ﷺ said:
«عَشْرٌ مِنَ الْفِطْرَةِ: … قَصُّ الشَّارِبِ وَإِعْفَاءُ اللِّحْيَةِ…»
“Ten acts are from the natural disposition (fiṭrah)… trimming the moustache and letting the beard grow.”
— [Ṣaḥīḥ Muslim, Kitāb al-Ṭahārah, Bāb Khaṣāl al-Fiṭrah, ḥadīth 261]
2. Command to Let the Beard Grow and Trim the Moustache:
From ʿAbdullāh ibn ʿUmar رضي الله عنهما:
«خَالِفُوا الْمُشْرِكِينَ، وَفِّرُوا اللِّحَى، وَأَحْفُوا الشَّوَارِبَ»
“Oppose the polytheists: let your beards grow and trim your moustaches.”
— [Ṣaḥīḥ al-Bukhārī, ḥadīth 5892, 5893]
— [Ṣaḥīḥ Muslim, ḥadīth 259/54]
In another narration:
«أَعْفُوا اللِّحَى، وَجُزُّوا الشَّوَارِبَ»
“Let the beards grow and cut the moustaches.”
3. Opposing the Jews and Christians:
From Abū Umāmah رضي الله عنه:
“We said: O Messenger of Allah, the People of the Book shave their beards and let their moustaches grow!
The Prophet ﷺ replied:
‘Trim the moustaches, grow the beards, and oppose the People of the Book.’”
— [Musnad Aḥmad 5/264–265, ḥadīth 22639]
❖ Ruling Derived from These Aḥādīth:
These aḥādīth clearly show that:
① Trimming the moustache and
② Letting the beard grow
are part of Islamic fiṭrah (natural way).
Whereas:
- Shaving the beard or
- Growing the moustache
is opposing the Sunnah and imitating Jews and Christians.
Hence, a person who grows his moustache and does not trim it is in violation of the clear command of the Messenger of Allah ﷺ.
Disobeying the Prophet ﷺ is not a minor matter. Allah warns:
﴿فَلْيَحْذَرِ الَّذِينَ يُخَالِفُونَ عَنْ أَمْرِهِ أَن تُصِيبَهُمْ فِتْنَةٌ أَوْ يُصِيبَهُمْ عَذَابٌ أَلِيمٌ﴾
“So let those beware who oppose his command, lest a trial afflict them or a painful punishment befall them.”
— Surah al-Nūr (24:63)
❖ How Long Should the Beard Be?
The Prophet ﷺ gave five different verbal instructions regarding the beard:
- «أعفوا»
- «أوفوا»
- «أرخوا»
- «أرجوا»
- «وفروا»
These all command to:
“Let the beard grow freely,”
“Leave it,”
“Let it hang down,”
“Give it fullness,”
“Do not cut it short.”
Imām Nawawī رحمه الله explains:
“All five terms carry the meaning of leaving the beard in its natural state, and their literal wording indicates a clear command to do so.”
— [Sharḥ Ṣaḥīḥ Muslim]
❖ Is the “One Fist” Rule a Limit?
Some scholars have stated that one should let the beard grow at least one fist in length, and that shortening it beyond that is impermissible, except for trimming what exceeds a fist — and this is based on the action of ʿAbdullāh ibn ʿUmar رضي الله عنهما.
However, the Prophet ﷺ himself never limited the beard to a specific measurement.
Rather, the authentic ḥadīths consistently state to “let it grow” — which clearly implies that cutting it short or shaving it is against the Sunnah.
✅ Summary:
✔ Trimming the moustache and growing the beard is part of Islamic fiṭrah, and a clear Sunnah command of the Prophet ﷺ.
✔ Shaving the beard or letting the moustache grow long is imitation of non-Muslims and disobedience to the Prophet ﷺ.
✔ The correct approach is to leave the beard to grow naturally without restricting it to a specific length unless it exceeds excessive length, as per some Ṣaḥābah.
✔ Statements like “keep only one fist length for more reward” are not proven from the Prophet ﷺ.
